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Shera CA. Swept Along: Measuring Otoacoustic Emissions Using Continuously Varying Stimuli. J Assoc Res Otolaryngol 2024; 25:91-102. [PMID: 38409555 PMCID: PMC11018600 DOI: 10.1007/s10162-024-00934-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 01/31/2024] [Indexed: 02/28/2024] Open
Abstract
At the 2004 Midwinter Meeting of the Association for Research in Otolaryngology, Glenis Long and her colleagues introduced a method for measuring distortion-product otoacoustic emissions (DPOAEs) using primary-tone stimuli whose instantaneous frequencies vary continuously with time. In contrast to standard OAE measurement methods, in which emissions are measured in the sinusoidal steady state using discrete tones of well-defined frequency, the swept-tone method sweeps across frequency, often at rates exceeding 1 oct/s. The resulting response waveforms are then analyzed using an appropriate filter (e.g., by least-squares fitting). Although introduced as a convenient way of studying DPOAE fine structure by separating the total OAE into distortion and reflection components, the swept-tone method has since been extended to stimulus-frequency emissions and has proved an efficient and valuable tool for probing cochlear mechanics. One day-a long time coming-swept tones may even find their way into the audiology clinic.
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Affiliation(s)
- Christopher A Shera
- Caruso Department of Otolaryngology, University of Southern California, Los Angeles, CA, 90033, USA.
- Department of Physics & Astronomy, University of Southern California, Los Angeles, CA, 90033, USA.
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Manley GA, Maat B, Begall S, Malkemper P, Caspar KR, Moritz L, van Dijk P. Otoacoustic emissions in African mole-rats. Hear Res 2024; 445:108994. [PMID: 38520899 DOI: 10.1016/j.heares.2024.108994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 03/11/2024] [Accepted: 03/13/2024] [Indexed: 03/25/2024]
Abstract
African mole-rats display highly derived hearing that is characterized by low sensitivity and a narrow auditory range restricted to low frequencies < 10 kHz. Recently, it has been suggested that two species of these rodents do not exhibit distortion product otoacoustic emissions (DPOAE), which was interpreted as evidence for a lack of cochlear amplification. If true, this would make them unique among mammals. However, both theoretical considerations on the generation of DPOAE as well as previously published experimental evidence challenge this assumption. We measured DPOAE and stimulus-frequency otoacoustic emissions (SFOAE) in three species of African mole-rats (Ansell's mole-rat - Fukomys anselli; Mashona mole-rat - Fukomys darlingi; naked mole-rat - Heterocephalus glaber) and found unexceptional otoacoustic emission values. Measurements were complicated by the remarkably long, narrow and curved external ear canals of these animals, for which we provide a morphological description. Both DPOAE and SFOAE displayed the highest amplitudes near 1 kHz, which corresponds to the region of best hearing in all tested species, as well as to the frequency region of the low-frequency acoustic fovea previously described in Ansell's mole-rat. Thus, the cochlea in African mole-rats shares the ability to generate evoked otoacoustic emission with other mammals.
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Affiliation(s)
- Geoffrey A Manley
- Department of Neuroscience, Faculty of Medicine, and Cluster of Excellence "Hearing for All", University of Oldenburg, 26129 Oldenburg, Germany.
| | - Bert Maat
- University of Groningen, University Medical Center Groningen, Department of Otorhinolaryngology/Head and Neck Surgery, Groningen, The Netherlands
| | - Sabine Begall
- Department of General Zoology, University of Duisburg-Essen, Essen, Germany
| | - Pascal Malkemper
- Max Planck Research Group Neurobiology of Magnetoreception, Max Planck Institute for Neurobiology of Behavior - caesar, Bonn, Germany
| | - Kai R Caspar
- Department of General Zoology, University of Duisburg-Essen, Essen, Germany; Institute for Cell Biology, Heinrich Heine University, Düsseldorf, Germany
| | - Leif Moritz
- Max Planck Research Group Neurobiology of Magnetoreception, Max Planck Institute for Neurobiology of Behavior - caesar, Bonn, Germany
| | - Pim van Dijk
- University of Groningen, University Medical Center Groningen, Department of Otorhinolaryngology/Head and Neck Surgery, Groningen, The Netherlands
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Nørgaard KM, Motallebzadeh H, Puria S. The influence of tympanic-membrane orientation on acoustic ear-canal quantities: A finite-element analysis. J Acoust Soc Am 2024; 155:2769-2785. [PMID: 38662609 PMCID: PMC11052631 DOI: 10.1121/10.0025768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 02/23/2024] [Accepted: 04/01/2024] [Indexed: 04/28/2024]
Abstract
Assuming plane waves, ear-canal acoustic quantities, collectively known as wideband acoustic immittance (WAI), are frequently used in research and in the clinic to assess the conductive status of the middle ear. Secondary applications include compensating for the ear-canal acoustics when delivering stimuli to the ear and measuring otoacoustic emissions. However, the ear canal is inherently non-uniform and terminated at an oblique angle by the conical-shaped tympanic membrane (TM), thus potentially confounding the ability of WAI quantities in characterizing the middle-ear status. This paper studies the isolated possible confounding effects of TM orientation and shape on characterizing the middle ear using WAI in human ears. That is, the non-uniform geometry of the ear canal is not considered except for that resulting from the TM orientation and shape. This is achieved using finite-element models of uniform ear canals terminated by both lumped-element and finite-element middle-ear models. In addition, the effects on stimulation and reverse-transmission quantities are investigated, including the physical significance of quantities seeking to approximate the sound pressure at the TM. The results show a relatively small effect of the TM orientation on WAI quantities, except for a distinct delay above 10 kHz, further affecting some stimulation and reverse-transmission quantities.
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Affiliation(s)
- Kren Monrad Nørgaard
- Interacoustics Research Unit, 2800 Kongens Lyngby, Denmark
- Interacoustics A/S, 5500 Middelfart, Denmark
| | - Hamid Motallebzadeh
- Department of Communication Sciences & Disorders, California State University, Sacramento, California 95819, USA
- Department of Biomedical Engineering, McGill University, Montréal, Quebec H3A 2B4, Canada
| | - Sunil Puria
- Eaton-Peabody Laboratories, Massachusetts Eye and Ear, Boston, Massachusetts 02114, USA
- Department of Otolaryngology, Harvard Medical School, Boston, Massachusetts 02115, USA
- Graduate Program in Speech and Hearing Bioscience and Technology, Harvard University, Cambridge, Massachusetts 02138, USA
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Schilder AGM, Wolpert S, Saeed S, Middelink LM, Edge ASB, Blackshaw H, Pastiadis K, Bibas AG. A phase I/IIa safety and efficacy trial of intratympanic gamma-secretase inhibitor as a regenerative drug treatment for sensorineural hearing loss. Nat Commun 2024; 15:1896. [PMID: 38429256 PMCID: PMC10907343 DOI: 10.1038/s41467-024-45784-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 02/01/2024] [Indexed: 03/03/2024] Open
Abstract
Inhibition of Notch signalling with a gamma-secretase inhibitor (GSI) induces mammalian hair cell regeneration and partial hearing restoration. In this proof-of-concept Phase I/IIa multiple-ascending dose open-label trial (ISRCTN59733689), adults with mild-moderate sensorineural hearing loss received 3 intratympanic injections of GSI LY3056480, in 1 ear over 2 weeks. Phase I primary outcome was safety and tolerability. Phase lla primary outcome was change from baseline to 12 weeks in average pure-tone air conduction threshold across 2,4,8 kHz. Secondary outcomes included this outcome at 6 weeks and change from baseline to 6 and 12 weeks in pure-tone thresholds at individual frequencies, speech reception thresholds (SRTs), Distortion Product Otoacoustic Emissions (DPOAE) amplitudes, Signal to Noise Ratios (SNRs) and distribution of categories normal, present-abnormal, absent and Hearing Handicap Inventory for Adults/Elderly (HHIA/E). In Phase I (N = 15, 1 site) there were no severe nor serious adverse events. In Phase IIa (N = 44, 3 sites) the average pure-tone threshold across 2,4,8 kHz did not change from baseline to 6 and 12 weeks (estimated change -0.87 dB; 95% CI -2.37 to 0.63; P = 0.252 and -0.46 dB; 95% CI -1.94 to 1.03; P = 0.545, respectively), nor did the means of secondary measures. DPOAE amplitudes, SNRs and distribution of categories did not change from baseline to 6 and 12 weeks, nor did SRTs and HHIA/E scores. Intratympanic delivery of LY3056480 is safe and well-tolerated; the trial's primary endpoint was not met.
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Affiliation(s)
- Anne G M Schilder
- National Institute for Health Research University College London Hospitals Biomedical Research Centre, London, UK
- Ear Institute, University College London, London, UK
- Royal National ENT and Eastman Dental Hospitals, University College London Hospitals Trust, London, UK
| | - Stephan Wolpert
- Department of Otolaryngology, Head and Neck Surgery, University of Tübingen, Tübingen, Germany.
| | - Shakeel Saeed
- National Institute for Health Research University College London Hospitals Biomedical Research Centre, London, UK
- Ear Institute, University College London, London, UK
- Royal National ENT and Eastman Dental Hospitals, University College London Hospitals Trust, London, UK
| | | | - Albert S B Edge
- Department of Otolaryngology, Harvard Medical School, Boston, USA
| | - Helen Blackshaw
- National Institute for Health Research University College London Hospitals Biomedical Research Centre, London, UK
- Ear Institute, University College London, London, UK
| | - Kostas Pastiadis
- 1st Department of Otolaryngology, Hippocration Hospital Athens, National & Kapodistrian University of Athens, Athens, Greece
| | - Athanasios G Bibas
- 1st Department of Otolaryngology, Hippocration Hospital Athens, National & Kapodistrian University of Athens, Athens, Greece
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Solis-Angeles S, Del Razo LM, Aguilar-Madrid G, Jiménez-Ramírez C, Coco L, Cabello-López A, Juárez-Pérez CA. Occupational Lead Exposure Ototoxicity Evaluated With Distortion-Product Otoacoustic Emissions. Ear Hear 2024; 45:329-336. [PMID: 37700446 DOI: 10.1097/aud.0000000000001431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
OBJECTIVES To evaluate the extent of hearing loss among pottery workers in Mexico exposed to lead. DESIGN The authors conducted a cross-sectional study including 315 adult pottery workers. Auditory function was evaluated by air conduction pure-tone audiometry (pure-tone average) and distortion-product otoacoustic emission (DPOAE) levels (amplitude and signal-to-noise ratio). Lead exposure was assessed with a single blood sample test and classified as low, medium, and high according to blood lead tertiles. Logistic regression models were calculated for the association between blood lead levels, pure-tone average, and DPOAE records. RESULTS Median (25th-75th) blood lead levels were 14 μg/dL (7.5-22.6 μg/dL). The audiometric pattern and DPOAE records were similar across blood lead levels groups in all frequencies, and no statistically significant differences were found. Adjusted logistic regression models showed no increase in the odds for hearing thresholds >25 dB (HL) and DPOAE absence associated with blood lead levels, and no dose-response pattern was observed ( p > 0.05). CONCLUSIONS Given the results from this cross-sectional study, no association was found between blood lead levels and hearing loss assessed with DPOAE. Future longitudinal work should consider chronic lead exposure estimates among underrepresented populations, which can potentially inform safer work practices to minimize the risk of ototoxicity.
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Affiliation(s)
- Soledad Solis-Angeles
- Departamento de Toxicología, Centro de Investigación y Estudios Avanzados, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Luz María Del Razo
- Departamento de Toxicología, Centro de Investigación y Estudios Avanzados, Instituto Politécnico Nacional, Mexico City, Mexico
| | - Guadalupe Aguilar-Madrid
- Departamento de Salud Pública, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Carmina Jiménez-Ramírez
- Laboratorio de Análisis Clínico, Hospital de Traumatología "Dr. Victorio De la Fuente Narváez," Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Laura Coco
- Oregon Hearing Research Center, Oregon Health & Science University, Portland, Oregon, USA
| | - Alejandro Cabello-López
- Unidad de Investigación de Salud en el Trabajo, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
| | - Cuauhtémoc Arturo Juárez-Pérez
- Unidad de Investigación de Salud en el Trabajo, Centro Médico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Mexico City, Mexico
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Liu Y, Gong Q. Deep Learning Models for Predicting Hearing Thresholds Based on Swept-Tone Stimulus-Frequency Otoacoustic Emissions. Ear Hear 2024; 45:465-475. [PMID: 37990395 DOI: 10.1097/aud.0000000000001443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
OBJECTIVES This study aims to develop deep learning (DL) models for the quantitative prediction of hearing thresholds based on stimulus-frequency otoacoustic emissions (SFOAEs) evoked by swept tones. DESIGN A total of 174 ears with normal hearing and 388 ears with sensorineural hearing loss were studied. SFOAEs in the 0.3 to 4.3 kHz frequency range were recorded using linearly swept tones at a rate of 2 Hz/msec, with stimulus level changing from 40 to 60 dB SPL in 10 dB steps. Four DL models were used to predict hearing thresholds at octave frequencies from 0.5 to 4 kHz. The models-a conventional convolutional neural network (CNN), a hybrid CNN-k-nearest neighbor (KNN), a hybrid CNN-support vector machine (SVM), and a hybrid CNN-random forest (RF)-were individually built for each frequency. The input to the DL models was the measured raw SFOAE amplitude spectra and their corresponding signal to noise ratio spectra. All DL models shared a CNN-based feature self-extractor. They differed in that the conventional CNN utilized a fully connected layer to make the final regression decision, whereas the hybrid CNN-KNN, CNN-SVM, and CNN-RF models were designed by replacing the last fully connected layer of CNN model with a traditional machine learning (ML) regressor, that is, KNN, SVM, and RF, respectively. The model performance was evaluated using mean absolute error and SE averaged over 20 repetitions of 5 × 5 fold nested cross-validation. The performance of the proposed DL models was compared with two types of traditional ML models. RESULTS The proposed SFOAE-based DL models resulted in an optimal mean absolute error of 5.98, 5.22, 5.51, and 6.06 dB at 0.5, 1, 2, and 4 kHz, respectively, superior to that obtained by the traditional ML models. The produced SEs were 8.55, 7.27, 7.58, and 7.95 dB at 0.5, 1, 2, and 4 kHz, respectively. All the DL models outperformed any of the traditional ML models. CONCLUSIONS The proposed swept-tone SFOAE-based DL models were capable of quantitatively predicting hearing thresholds with satisfactory performance. With DL techniques, the underlying relationship between SFOAEs and hearing thresholds at disparate frequencies was explored and captured, potentially improving the diagnostic value of SFOAEs.
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Affiliation(s)
- Yin Liu
- Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China
| | - Qin Gong
- Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China
- School of Medicine, Shanghai University, Shanghai, China
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Main M, Skoe E. Heightened OAEs in young adult musicians: Influence of current noise exposure and training recency. Hear Res 2024; 442:108925. [PMID: 38141520 PMCID: PMC10843712 DOI: 10.1016/j.heares.2023.108925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 11/26/2023] [Accepted: 12/03/2023] [Indexed: 12/25/2023]
Abstract
Otoacoustic emissions (OAEs) are a non-invasive metric of cochlear function. Studies of OAEs in musicians have yielded mixed results, ranging from evidence of diminished OAEs in musicians-suggesting noise-induced hearing loss-to no difference when compared to non-musicians, or even a trend for stronger OAEs in musicians. The goal of this study was to use a large sample of college students with normal hearing (n = 160) to compare OAE SNRs in musicians and non-musicians and to explore potential effects of training recency and noise exposure on OAEs in these cohorts. The musician cohort included both active musicians (who at the time of enrollment practiced at least weekly) and past musicians (who had at least 6 years of training). All participants completed a questionnaire about recent noise exposure (previous 12 months), and a subset of participants (71 musicians and 15 non-musicians) wore a personal noise dosimeter for one week to obtain a more nuanced and objective measure of exposure to assess how different exposure levels may affect OAEs before the emergence of a clinically significant hearing loss. OAEs were tested using both transient-evoked OAEs (TEOAEs) and distortion-product OAEs (DPOAEs). As predicted from the literature, musicians experienced significantly higher noise levels than non-musicians based on both subjective (self-reported) and objective measures. Yet we found stronger TEOAEs and DPOAEs in musicians compared to non-musicians in the ∼1-5 kHz range. Comparisons between past and active musicians suggest that enhanced cochlear function in young adult musicians does not require active, ongoing musical practice. Although there were no significant relations between OAEs and noise exposure as measured by dosimetry or questionnaire, active musicians had weaker DPOAEs than past musicians when the entire DPOAE frequency range was considered (up to ∼16 kHz), consistent with a subclinical noise-induced hearing loss that only becomes apparent when active musicians are contrasted with a cohort of individuals with comparable training but without the ongoing risks of noise exposure. Our findings suggest, therefore, that separate norms should be developed for musicians for earlier detection of incipient hearing loss. Potential explanations for enhanced cochlear function in musicians include pre-existing (inborn or demographic) differences, training-related enhancements of cochlear function (e.g., upregulation of prestin, stronger efferent feedback mechanisms), or a combination thereof. Further studies are needed to determine if OAE enhancements offer musicians protection against damage caused by noise exposure.
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Affiliation(s)
- Morgan Main
- Department of Speech, Language, and Hearing Sciences, United States; Department of Physiology and Neurobiology, United States; University of Connecticut, Storrs, CT 06269, United States; University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, United States
| | - Erika Skoe
- Department of Speech, Language, and Hearing Sciences, United States; Department of Psychological Sciences, Cognitive Sciences Program, Connecticut Institute for Brain and Cognitive Sciences, United States; University of Connecticut, Storrs, CT 06269, United States.
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Mo C, Ma TF, McPherson B. ABO blood group and cochlear function: evidence from a large sample size study. Int J Audiol 2024; 63:106-116. [PMID: 36576100 DOI: 10.1080/14992027.2022.2158379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 12/05/2022] [Indexed: 12/29/2022]
Abstract
OBJECTIVE The present study investigated the effect of blood group on cochlear function in a large participant sample across different age groups. The study hypothesis was that participants with blood group O would show relatively reduced cochlear function as reflected in otoacoustic emission (OAE) measures. DESIGN Data were collected from transient evoked otoacoustic emission (TEOAE), distortion product otoacoustic emission (DPOAE), DPOAE input/output (I/O) function, and spontaneous otoacoustic emission (SOAE) recordings. STUDY SAMPLE Four hundred and sixty-three normal hearing adults aged 20-59 years among the four ABO blood groups participated in the study. RESULTS TEOAE and DPOAE amplitudes did not reveal significant differences for participants with blood group O compared with participants with non-O blood groups. No significant differences in I/O function categories were found among participants with different blood groups. SOAE prevalence was also not significantly different across blood groups. However, previously reported age and gender differences for OAE variables were confirmed. CONCLUSIONS Participants with blood group O were not found to have significantly reduced cochlear function, based on OAE measures. Results from the current study do not support the hypothesis that normal hearing individuals with different ABO blood groups differ in level of cochlear function.
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Affiliation(s)
- Changgeng Mo
- Human Communication, Development and Information Sciences, Faculty of Education, University of Hong Kong, Hong Kong SAR, China
| | - Ting Fung Ma
- Department of Statistics, University of South Carolina, Columbia, South Carolina, USA
| | - Bradley McPherson
- Human Communication, Development and Information Sciences, Faculty of Education, University of Hong Kong, Hong Kong SAR, China
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Simsek A, Aslan M. Evaluation of the auditory findings of patients with obstructive sleep apnea syndrome. Am J Otolaryngol 2024; 45:104027. [PMID: 37659225 DOI: 10.1016/j.amjoto.2023.104027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 08/10/2023] [Accepted: 08/17/2023] [Indexed: 09/04/2023]
Abstract
OBJECTIVES To investigate the effects of hypoxia occurring in patients with Obstructive Sleep Apnea Syndrome (OSAS) on Auditory evoked late latency, Auditory brainstem response, and the contralateral suppression of otoacoustic emissions. MATERIALS AND METHODS 46 patients diagnosed with OSAS were divided into groups as moderate and severe based on their Apnea Hipopnea Index (AHI) values. The control group consisted of 22 healthy individuals. All participants underwent an Auditory Brainstem Response (ABR) test, Auditory Evoked Late Latency Response (LLR), and Contralateral Suppression Otoacoustic Emission (CS-OAE). FINDINGS There was no statistical difference between the OSAS group and the control group regarding P1 latency, N1 latency, and P1 and N1 wave amplitude (p > 0.05). In ABR, statistically significant differences were found between the control, moderate OSAS, and severe OSAS groups in wave I in the right and left ear (p < 0.05). In the analyses performed for the otoacoustic emission frequencies with and without contralateral suppression of the right and left ear, suppression was not observed at some frequencies, and this was regarded as statistically significant (p < 0.05). CONCLUSION It is considered that OSAS does not have cortical effects but impacts the brainstem region and the cochlea. Bilateral impact, especially observed in wave I of ABR, is prominent on the auditory nerve. Considering that the medial olivo-cochlear (MOC) system is affected in patients with OSAS, it is thought that these patients are inadequate in suppressing noise, and this may cause various problems, particularly the inability to distinguish speech in noisy environments.
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Affiliation(s)
- Agit Simsek
- Department of Audiology, Inonu University Faculty of Health Sciences, Malatya, Turkey.
| | - Mehmet Aslan
- Department of Otorhinolaryngology Head and Neck Surgery, Inonu University Faculty of Medicine, Malatya, Turkey.
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Santarelli R, Scimemi P, Cama E, Domínguez-Ruiz M, Bonora C, Gallo C, Rodríguez-Ballesteros M, del Castillo I. Preservation of Distortion Product Otoacoustic Emissions in OTOF -Related Hearing Impairment. Ear Hear 2024; 45:250-256. [PMID: 37677959 PMCID: PMC10718209 DOI: 10.1097/aud.0000000000001421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Accepted: 07/16/2023] [Indexed: 09/09/2023]
Abstract
OBJECTIVES Attenuation of otoacoustic emissions over time has been reported for many patients with hearing impairment harboring mutations in the OTOF gene. In this study, the time course of changes of distortion product otoacoustic emissions (DPOAEs) has been analyzed in a cohort of patients in the light of tympanometry results. DESIGN The changes of DPOAEs in 16 patients with OTOF -related hearing impairment were retrospectively analyzed. RESULTS All but one subject showed DPOAEs bilaterally at the time of diagnosis. Three patients diagnosed as adults still had DPOAEs at ages of 27, 31, and 47 years, respectively. Follow-up was available for 7 children diagnosed at the age of 1 to 3 years, who still showed preservation of DPOAEs at ages of 5 to 16 years. The responses were absent or attenuated in amplitude at some follow-up appointments in association with type B or C tympanograms. CONCLUSIONS DPOAEs are preserved much longer than expected in a cohort of patients with OTOF -related hearing impairment. The previously reported loss of DPOAEs may have been caused in some children by increased middle ear impedance due to otitis media.
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Affiliation(s)
- Rosamaria Santarelli
- Department of Neurosciences, University of Padua, Padua, Italy
- Audiology Service, Santi Giovanni e Paolo Hospital, Venezia, Italy
| | - Pietro Scimemi
- Department of Neurosciences, University of Padua, Padua, Italy
- Audiology Service, Santi Giovanni e Paolo Hospital, Venezia, Italy
| | - Elona Cama
- Department of Neurosciences, University of Padua, Padua, Italy
- Audiology Service, Santi Giovanni e Paolo Hospital, Venezia, Italy
| | - María Domínguez-Ruiz
- Servicio de Genética, Hospital Universitario Ramón y Cajal, IRYCIS, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain
| | - Chiara Bonora
- Department of Neurosciences, University of Padua, Padua, Italy
| | - Chiara Gallo
- Department of Neurosciences, University of Padua, Padua, Italy
| | | | - Ignacio del Castillo
- Servicio de Genética, Hospital Universitario Ramón y Cajal, IRYCIS, Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain
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11
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Wang Z, Cao Q, Hu S, Fan X, Lv J, Wang H, Wang W, Li H, Shu Y. [Study on gene therapy for DPOAE and ABR threshold changes in adult Otof-/- mice]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2024; 38:49-56. [PMID: 38297849 DOI: 10.13201/j.issn.2096-7993.2024.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Indexed: 02/02/2024]
Abstract
Objective:This study aims to analyze the threshold changes in distortion product otoacoustic emissions(DPOAE) and auditory brainstem response(ABR) in adult Otof-/- mice before and after gene therapy, evaluating its effectiveness and exploring methods for assessing hearing recovery post-treatment. Methods:At the age of 4 weeks, adult Otof-/- mice received an inner ear injection of a therapeutic agent containing intein-mediated recombination of the OTOF gene, delivered via dual AAV vectors through the round window membrane(RWM). Immunofluorescence staining assessed the proportion of inner ear hair cells with restored otoferlin expression and the number of synapses.Statistical analysis was performed to compare the DPOAE and ABR thresholds before and after the treatment. Results:AAV-PHP. eB demonstrates high transduction efficiency in inner ear hair cells. The therapeutic regimen corrected hearing loss in adult Otof-/- mice without impacting auditory function in wild-type mice. The changes in DPOAE and ABR thresholds after gene therapy are significantly correlated at 16 kHz. Post-treatment,a slight increase in DPOAE was observeds,followed by a recovery trend at 2 months post-treatment. Conclusion:Gene therapy significantly restored hearing in adult Otof-/- mice, though the surgical delivery may cause transient hearing damage. Precise and gentle surgical techniques are essential to maximize gene therapy's efficacy.
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Affiliation(s)
- Zijing Wang
- Department of Otolaryngology,Second Affiliated Hospital of South China University Hengyang,421001,China
- Otolaryngology Department of Fudan University Affiliated Eye,Ear,Nose and Throat Hospital
| | - Qi Cao
- Department of Otolaryngology,Second Affiliated Hospital of South China University Hengyang,421001,China
- Otolaryngology Department of Fudan University Affiliated Eye,Ear,Nose and Throat Hospital
| | - Shaowei Hu
- Otolaryngology Department of Fudan University Affiliated Eye,Ear,Nose and Throat Hospital
| | - Xintai Fan
- Otolaryngology Department of Fudan University Affiliated Eye,Ear,Nose and Throat Hospital
| | - Jun Lv
- Otolaryngology Department of Fudan University Affiliated Eye,Ear,Nose and Throat Hospital
| | - Hui Wang
- Otolaryngology Department of Fudan University Affiliated Eye,Ear,Nose and Throat Hospital
| | - Wuqing Wang
- Otolaryngology Department of Fudan University Affiliated Eye,Ear,Nose and Throat Hospital
| | - Huawei Li
- Otolaryngology Department of Fudan University Affiliated Eye,Ear,Nose and Throat Hospital
| | - Yilai Shu
- Department of Otolaryngology,Second Affiliated Hospital of South China University Hengyang,421001,China
- Otolaryngology Department of Fudan University Affiliated Eye,Ear,Nose and Throat Hospital
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12
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Lapsley Miller JA, Reed CM, Marshall L, Perez ZD, Villabona T. A Clinically Viable Medial Olivocochlear Reflex Assay Using Transient-Evoked Otoacoustic Emissions. Ear Hear 2024; 45:115-129. [PMID: 37475147 DOI: 10.1097/aud.0000000000001406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/22/2023]
Abstract
OBJECTIVES The contralateral medial olivocochlear reflex (MOCR) strength may indicate various auditory conditions in humans, but a clinically viable assay and equipment are needed for quick, accurate, and reliable measurements. The first experiment compared an earlier version of the assay, which used a nonlinear-mode chirp stimulus, with a new assay using a linear-mode click stimulus, designed to give reliable MOCR measurements in most normal-hearing ears. The second experiment extended the improved assay on a purpose-built binaural hardware platform that used forward-pressure level (FPL) calibration for both the stimulus and the contralateral MOCR elicitor. DESIGN Transient-evoked otoacoustic emission (TEOAE) tests were measured with and without a 60-dB SPL MOCR-evoking contralateral broadband noise. The normalized MOCR strength (MOCR%) was derived from the TEOAE responses for each trial pair using the complex pressure difference weighted by the TEOAE magnitude. Experiment 1 compared MOCR% within-subject and across-day using two TEOAE stimuli: nonlinear-mode chirps (50 dB SPL, bandpass 1-5 kHz, 14 ms window delayed by 2 ms) and linear-mode clicks (50 dB SPL, bandpass 0.5-2.5 kHz, 13 ms window delayed by 5 ms). TEOAE responses were analyzed in the 0.5 to 2.5 kHz band. Thirty adult participants with normal hearing (30 ears) completed the study. The TEOAE stimulus was calibrated in situ using spectral flattening, and the contralateral noise was calibrated in a coupler. Twelve TEOAE trial pairs were collected for each participant and condition. Experiment 2 used a purpose-built binaural system. The TEOAE stimuli were linear-mode clicks (50 dB SPL, bandpass 1-3 kHz, 13 ms window delayed by 5 ms), analyzed in the 1 to 3 kHz band over ~12 trial pairs. After a probe refit, an additional trial pair was collected for the two early-stopping signal-to-noise ratio criteria (15 and 20 dB). They were evaluated for single-trial reliability and test time. Nineteen adult participants with normal hearing (38 ears) completed the study. The TEOAE clicks and contralateral elicitor noise were calibrated in situ using FPL and delivered with automated timing. RESULTS MOCR% for linear-mode clicks was distinguishable from measurement variability in 98% to 100% of participants' ears (both experiments), compared with only 73% for the nonlinear-mode chirp (experiment 1). MOCR detectability was assessed using the MOCR% across-subject/within-subject variance ratio. The ratio in experiment 1 for linear-mode clicks was higher (8.0) than for nonlinear-mode chirps (6.4). The ratio for linear-mode clicks (8.9) in experiment 2 was slightly higher than for the comparable linear-mode stimulus (8.0) in experiment 1. TEOAEs showed excellent reliability with high signal-to-noise ratios in both experiments, but reliability was higher for linear-mode clicks than nonlinear-mode chirps. MOCR reliability for the two stimuli was comparable. The FPL pressure response retest reliability derived from the SPL at the microphone was higher than the SPL retest reliability across 0.4 to 8 kHz. Stable results required 2 to 3 trial pairs for the linear-mode click (experiments 1 and 2) and three for the nonlinear-mode chirp (experiment 1), taking around 2 min on average. CONCLUSIONS The linear-mode click assay produced measurable, reliable, and stable TEOAE and MOCR results on both hardware platforms in around 2 min per ear. The stimulus design and response window ensured that any stimulus artifact in linear mode was unlikely to confound the results. The refined assay is ready to produce high-quality data quickly for clinical and field studies to develop population norms, recognize diagnostic patterns, and determine risk profiles.
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Affiliation(s)
- Judi A Lapsley Miller
- Mimosa Acoustics, Champaign, Illinois, USA
- Naval Submarine Medical Research Laboratory, Groton, Connecticut, USA
| | - Charlotte M Reed
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Lynne Marshall
- Naval Submarine Medical Research Laboratory, Groton, Connecticut, USA
| | - Zachary D Perez
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
| | - Timothy Villabona
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
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Li Y, Yang X, Wang C, Cheng X, Qi B, En H, Wen C, Yu Y, Deng L, Liu D, Fu X, Liu H, Huang L. Analysis of audiological outcomes of children referred from a universal newborn hearing screening program over 9 years in Beijing, China. Sci Rep 2023; 13:22630. [PMID: 38114581 PMCID: PMC10730824 DOI: 10.1038/s41598-023-50171-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 12/15/2023] [Indexed: 12/21/2023] Open
Abstract
Universal newborn hearing screening (UNHS) and audiological diagnosis are crucial for children with congenital hearing loss (HL). The objective of this study was to analyze hearing screening techniques, audiological outcomes and risk factors among children referred from a UNHS program in Beijing. A retrospective analysis was performed in children who were referred to our hospital after failing UNHS during a 9-year period. A series of audiological diagnostic tests were administered to each case, to confirm and determine the type and degree of HL. Risk factors for HL were collected. Of 1839 cases, 53.0% were referred after only transient evoked otoacoustic emission (TEOAE) testing, 46.1% were screened by a combination of TEOAE and automatic auditory brainstem response (AABR) testing, and 1.0% were referred after only AABR testing. HL was confirmed in 55.7% of cases. Ears with screening results that led to referral experienced a more severe degree of HL than those with results that passed. Risk factors for HL were identified in 113 (6.1%) cases. The main risk factors included craniofacial anomalies (2.7%), length of stay in the neonatal intensive care unit longer than 5 days (2.4%) and birth weight less than 1500 g (0.8%). The statistical data showed that age (P < 0.001) and risk factors, including craniofacial anomalies (P < 0.001) and low birth weight (P = 0.048), were associated with the presence of HL. This study suggested that hearing screening plays an important role in the early detection of HL and that children with risk factors should be closely monitored.
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Affiliation(s)
- Yue Li
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
- Beijing Institute of Otolaryngology, Beijing, China
- Key Laboratory of Otolaryngology Head and Neck Surgery, Ministry of Education, Beijing, China
| | - Xiaozhe Yang
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
- Beijing Institute of Otolaryngology, Beijing, China
- Key Laboratory of Otolaryngology Head and Neck Surgery, Ministry of Education, Beijing, China
| | - Chuan Wang
- Maternal and Child Health Hospital of Chao Yang District, Beijing, China
| | - Xiaohua Cheng
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
- Beijing Institute of Otolaryngology, Beijing, China
- Key Laboratory of Otolaryngology Head and Neck Surgery, Ministry of Education, Beijing, China
| | - Beier Qi
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
- Beijing Institute of Otolaryngology, Beijing, China
- Key Laboratory of Otolaryngology Head and Neck Surgery, Ministry of Education, Beijing, China
| | - Hui En
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
- Beijing Institute of Otolaryngology, Beijing, China
- Key Laboratory of Otolaryngology Head and Neck Surgery, Ministry of Education, Beijing, China
| | - Cheng Wen
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
- Beijing Institute of Otolaryngology, Beijing, China
- Key Laboratory of Otolaryngology Head and Neck Surgery, Ministry of Education, Beijing, China
| | - Yiding Yu
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
- Beijing Institute of Otolaryngology, Beijing, China
- Key Laboratory of Otolaryngology Head and Neck Surgery, Ministry of Education, Beijing, China
| | - Lin Deng
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
- Beijing Institute of Otolaryngology, Beijing, China
- Key Laboratory of Otolaryngology Head and Neck Surgery, Ministry of Education, Beijing, China
| | - Dongxin Liu
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
- Beijing Institute of Otolaryngology, Beijing, China
- Key Laboratory of Otolaryngology Head and Neck Surgery, Ministry of Education, Beijing, China
| | - Xinxing Fu
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
- Beijing Institute of Otolaryngology, Beijing, China
- Key Laboratory of Otolaryngology Head and Neck Surgery, Ministry of Education, Beijing, China
- Ear Science Institute Australia, Subiaco, WA, Australia
| | - Hui Liu
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
- Beijing Institute of Otolaryngology, Beijing, China
- Key Laboratory of Otolaryngology Head and Neck Surgery, Ministry of Education, Beijing, China
| | - Lihui Huang
- Department of Otolaryngology-Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China.
- Beijing Institute of Otolaryngology, Beijing, China.
- Key Laboratory of Otolaryngology Head and Neck Surgery, Ministry of Education, Beijing, China.
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14
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AlMakadma HA, Reed BF, Sanford CA. An Absorbance Peak Template for Clinical Assessment of Sound Conduction in Newborn Ears. J Speech Lang Hear Res 2023; 66:5152-5168. [PMID: 37971558 DOI: 10.1044/2023_jslhr-23-00122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
PURPOSE Power absorbance measures recorded over a wide range of frequencies allow for clinical inferences about the outer/middle ears' acoustic mechanics. A frequency-dependent feature in the newborn wideband absorbance response, the prominent mid-frequency absorbance peak, has been linked to middle-ear resonance. However, current normative methods were not designed to assess subtle changes in such features. This work aims to develop and validate an absorbance peak template (APT) for assessment of absorbance peaks in newborns. Additional objectives are to compare test performance of absorbance peaks and APTs to existing normative methods, to demonstrate APT-based methods for categorization of abnormal absorbance peaks, and to describe absorbance peak test-retest variability. METHOD Peak absorbance and peak frequency were analyzed in a training data set (490 measurements in 84 newborn ears who passed transient evoked otoacoustic emissions [TEOAEs] screenings), and an APT was developed by computing normal limits on these two absorbance peak variables. Split-set analysis evaluated the reproducibility of APT, and test-retest analysis was performed. Test performance analysis, conveyed by area under the receiver operating characteristic curve (AROC) and 95% confidence intervals (CIs), compared absorbance peak variables to absorbance area indices (AAIs) in a validation data set (359 ears that passed distortion-product OAE [DPOAE] screening and 64 ears that failed). APT-based assessment paradigms for normal and abnormal ears were compared to the common absorbance normative range paradigm. RESULTS Split-set analysis demonstrated a good reproducibility of APT, and test-retest of absorbance peak variables showed that they were stable measures for clinical assessment. Test performance of peak absorbance (AROC = 0.83; 95% CI [0.77, 0.88]) was comparable to the top-performing AAI variables (AROC = 0.85; 95% CI [0.80, 0.90]). APT-based assessment categorized measurements based on their peak absorbance and peak frequency and enhanced the detection of subtle frequency changes that were missed by the normative range method. CONCLUSION Analysis of absorbance peaks guided by APT has the potential to simplify and improve assessments of sound conduction pathways in newborn ears and can be used together with or in-place of current methods for analysis of wideband absorbance data.
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Affiliation(s)
- Hammam A AlMakadma
- Department of Otolaryngology-HNS and Communicative Disorders, School of Medicine, University of Louisville, Louisville, KY
| | - Beth F Reed
- Penn State Health Milton S. Hershey Medical Center, Hershey, PA
| | - Chris A Sanford
- Department of Communication Sciences and Disorders, College of Health, Idaho State University, Pocatello
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15
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De Poortere N, Verhulst S, Degeest S, Keshishzadeh S, Dhooge I, Keppler H. Evaluation of Lifetime Noise Exposure History Reporting. J Speech Lang Hear Res 2023; 66:5129-5151. [PMID: 37988687 DOI: 10.1044/2023_jslhr-23-00266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
PURPOSE The purpose of this study is to critically evaluate lifetime noise exposure history (LNEH) reporting. First, two different approaches to evaluate the cumulative LNEH were compared. Second, individual LNEH was associated with the subjects' hearing status. Third, loudness estimates of exposure activities, by means of Jokitulppo- and Ferguson-based exposure levels, were compared with dosimeter sound-level measurements. METHOD One hundred one young adults completed the questionnaires, and a subgroup of 30 subjects underwent audiological assessment. Pure-tone audiometry, speech-in-noise intelligibility, distortion product otoacoustic emissions, auditory brainstem responses, and envelope following responses were included. Fifteen out of the 30 subjects took part in a noisy activity while wearing a dosimeter. RESULTS First, results demonstrate that the structured questionnaire yielded a greater amount of information pertaining to the diverse activities, surpassing the insights obtained from an open-ended questionnaire. Second, no significant correlations between audiological assessment and LNEH were found. Lastly, the results indicate that Ferguson-based exposure levels offer a more precise estimation of the actual exposure levels, in contrast to Jokitulppo-based estimates. CONCLUSIONS We propose several recommendations for determining the LNEH. First, it is vital to define accurate loudness categories and corresponding allocated levels, with a preference for the loudness levels proposed by Ferguson et al. (2019), as identified in this study. Second, a structured questionnaire regarding LNEH is recommended, discouraging open-ended questioning. Third, it is essential to include a separate category exclusively addressing work-related activities, encompassing various activities for more accurate surveying.
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Affiliation(s)
- Nele De Poortere
- Department of Rehabilitation Sciences-Audiology, Ghent University, Belgium
| | - Sarah Verhulst
- Department of Information Technology-Hearing Technology at WAVES, Ghent University, Belgium
| | - Sofie Degeest
- Department of Rehabilitation Sciences-Audiology, Ghent University, Belgium
| | - Sarineh Keshishzadeh
- Department of Information Technology-Hearing Technology at WAVES, Ghent University, Belgium
| | - Ingeborg Dhooge
- Department of Ear, Nose and Throat, Ghent University Hospital, Belgium
- Department of Head and Skin, Ghent University, Belgium
| | - Hannah Keppler
- Department of Rehabilitation Sciences-Audiology, Ghent University, Belgium
- Department of Head and Skin, Ghent University, Belgium
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16
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Gafoor SA, Uppunda AK. Speech Perception in Noise and Medial Olivocochlear Reflex: Effects of Age, Speech Stimulus, and Response-Related Variables. J Assoc Res Otolaryngol 2023; 24:619-631. [PMID: 38079021 PMCID: PMC10752852 DOI: 10.1007/s10162-023-00919-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 11/20/2023] [Indexed: 12/29/2023] Open
Abstract
PURPOSE The role of the medial olivocochlear system in speech perception in noise has been debated over the years, with studies showing mixed results. One possible reason for this could be the dependence of this relationship on the parameters used in assessing the speech perception ability (age, stimulus, and response-related variables). METHODS The current study assessed the influence of the type of speech stimuli (monosyllables, words, and sentences), the signal-to-noise ratio (+5, 0, -5, and -10 dB), the metric used to quantify the speech perception ability (percent-correct, SNR-50, and slope of the psychometric function) and age (young vs old) on the relationship between medial olivocochlear reflex (quantified by contralateral inhibition of transient evoked otoacoustic emissions) and speech perception in noise. RESULTS A linear mixed-effects model revealed no significant contributions of the medial olivocochlear reflex to speech perception in noise. CONCLUSION The results suggest that there was no evidence of any modulatory influence of the indirectly measured medial olivocochlear reflex strength on speech perception in noise.
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Affiliation(s)
- Shezeen Abdul Gafoor
- Facility for Advanced Auditory Research, Department of Audiology, All India Institute of Speech and Hearing, Mysuru, India
| | - Ajith Kumar Uppunda
- Department of Audiology, All India Institute of Speech and Hearing, Manasagangothri, Mysuru, India, 570006.
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17
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Wan H, Wang W, Liu J, Zhang Y, Yang B, Hua R, Chen H, Chen S, Hua Q. Cochlear metabolomics, highlighting novel insights of purine metabolic alterations in age-related hearing loss. Hear Res 2023; 440:108913. [PMID: 37939412 DOI: 10.1016/j.heares.2023.108913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 09/29/2023] [Accepted: 11/02/2023] [Indexed: 11/10/2023]
Abstract
Aging is an inevitable phase in mammals that leads to health impairments, including hearing loss. Age-related hearing loss (AHL) leads to psychosocial problems and cognitive decline in the elderly. In this study, mean thresholds of auditory brainstem responses (ABR) and distortion-product otoacoustic emissions (DPOAE) increased at multiple frequencies in aged rats (14 months old) compared to young rats (2 months old). Using untargeted ultra-high performance liquid chromatography-mass spectroscopy (LC-MS), we quantified molecular metabolic markers in the cochlea of aged rats with hearing loss. A total of 137 different metabolites were identified in two groups, highlighting several prominent metabolic pathways related to purine metabolism; glycine, serine, and threonine metabolism; arginine and proline metabolism; and pyrimidine metabolism. In addition, the beneficial effects of purine supplementation were demonstrated in a mimetic model of senescent marginal cells (MCs). Overall, altered metabolic profiling is both the cause and manifestation of pathology, and our results suggest that cellular senescence and dysfunctional cochlear metabolism may contribute to the progression of AHL. These findings are seminal in elucidating the pathophysiological mechanisms underlying AHL and serve as a basis for future clinical predictions and interventions in AHL.
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Affiliation(s)
- Huanzhi Wan
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China; Research Institute of Otolaryngology-Head and Neck Surgery, Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China; The First Clinical School of Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China
| | - Wenjing Wang
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China; Research Institute of Otolaryngology-Head and Neck Surgery, Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China; The First Clinical School of Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China
| | - Jingchun Liu
- The First Clinical School of Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China
| | - Yunlong Zhang
- Research Institute of Otolaryngology-Head and Neck Surgery, Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China; The First Clinical School of Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China
| | - Bingqian Yang
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China; Research Institute of Otolaryngology-Head and Neck Surgery, Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China; The First Clinical School of Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China
| | - Rongkai Hua
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China; Research Institute of Otolaryngology-Head and Neck Surgery, Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China; The First Clinical School of Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China
| | - Huidong Chen
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China; Research Institute of Otolaryngology-Head and Neck Surgery, Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China; The First Clinical School of Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China
| | - Shiming Chen
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China; Research Institute of Otolaryngology-Head and Neck Surgery, Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China.
| | - Qingquan Hua
- Department of Otolaryngology-Head and Neck Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China; Research Institute of Otolaryngology-Head and Neck Surgery, Wuhan University, Wuhan 430060, Hubei Province, People's Republic of China.
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18
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King CD, Lovich SN, Murphy DL, Landrum R, Kaylie D, Shera CA, Groh JM. Individual similarities and differences in eye-movement-related eardrum oscillations (EMREOs). Hear Res 2023; 440:108899. [PMID: 37979436 DOI: 10.1016/j.heares.2023.108899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 10/18/2023] [Accepted: 10/23/2023] [Indexed: 11/20/2023]
Abstract
We recently discovered a unique type of otoacoustic emission (OAE) time-locked to the onset (and offset) of saccadic eye movements and occurring in the absence of external sound (Gruters et al., 2018). How and why these eye-movement-related eardrum oscillations (EMREOs) are generated is unknown, with a role in visual-auditory integration being the likeliest candidate. Clues to both the drivers of EMREOs and their purpose can be gleaned by examining responses in normal hearing human subjects. Do EMREOs occur in all individuals with normal hearing? If so, what components of the response occur most consistently? Understanding which attributes of EMREOs are similar across participants and which show more variability will provide the groundwork for future comparisons with individuals with hearing abnormalities affecting the ear's various motor components. Here we report that in subjects with normal hearing thresholds and normal middle ear function, all ears show (a) measurable EMREOs (mean: 58.7 dB SPL; range 45-67 dB SPL for large contralateral saccades), (b) a phase reversal for contra- versus ipsilaterally-directed saccades, (c) a large peak in the signal occurring soon after saccade onset, (d) an additional large peak time-locked to saccade offset and (e) evidence that saccade duration is encoded in the signal. We interpret the attributes of EMREOs that are most consistent across subjects as the ones that are most likely to play an essential role in their function. The individual differences likely reflect normal variation in individuals' auditory system anatomy and physiology, much like traditional measures of auditory function such as auditory-evoked OAEs, tympanometry and auditory-evoked potentials. Future work will compare subjects with different types of auditory dysfunction to population data from normal hearing subjects. Overall, these findings provide important context for the widespread observations of visual- and eye-movement related signals found in cortical and subcortical auditory areas of the brain.
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Affiliation(s)
- Cynthia D King
- Department of Neurobiology, Duke University Medical Center, Durham, NC, USA; Department of Psychology and Neuroscience, Duke University, Durham, NC, USA; Center for Cognitive Neuroscience, Duke University, Durham, NC, USA; Duke Institute for Brain Sciences, Duke University, Durham, NC, USA.
| | - Stephanie N Lovich
- Department of Neurobiology, Duke University Medical Center, Durham, NC, USA; Department of Psychology and Neuroscience, Duke University, Durham, NC, USA; Center for Cognitive Neuroscience, Duke University, Durham, NC, USA; Duke Institute for Brain Sciences, Duke University, Durham, NC, USA
| | - David Lk Murphy
- Department of Psychology and Neuroscience, Duke University, Durham, NC, USA; Center for Cognitive Neuroscience, Duke University, Durham, NC, USA; Duke Institute for Brain Sciences, Duke University, Durham, NC, USA
| | - Rachel Landrum
- Department of Neurobiology, Duke University Medical Center, Durham, NC, USA; Department of Psychology and Neuroscience, Duke University, Durham, NC, USA; Center for Cognitive Neuroscience, Duke University, Durham, NC, USA; Duke Institute for Brain Sciences, Duke University, Durham, NC, USA
| | - David Kaylie
- Department of Otolaryngology, Duke University Medical Center, Durham, NC, USA
| | - Christopher A Shera
- Department of Otolaryngology, University of Southern California, Los Angeles, CA, USA
| | - Jennifer M Groh
- Department of Neurobiology, Duke University Medical Center, Durham, NC, USA; Department of Psychology and Neuroscience, Duke University, Durham, NC, USA; Center for Cognitive Neuroscience, Duke University, Durham, NC, USA; Duke Institute for Brain Sciences, Duke University, Durham, NC, USA; Department of Computer Science, Duke University, Durham, NC, USA; Department of Biomedical Engineering, Duke University, Durham, NC, USA
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Caglar Yagci H, Ozdamar OI, Ertugrul O, Salman CT, Yagci I. Hearing Loss and the Affecting Factors in Patients with Fibromyalgia. J Coll Physicians Surg Pak 2023; 33:1124-1129. [PMID: 37804017 DOI: 10.29271/jcpsp.2023.10.1124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 09/11/2023] [Indexed: 10/08/2023]
Abstract
OBJECTIVE To find the frequency of hearing loss in newly diagnosed patients with fibromyalgia (FM), and the factors affecting it. STUDY DESIGN Descriptive study. Place and Duration of the Study: Department of Physical Medicine and Rehabilitation and Department of Otorhinolaryngology Head and Neck Surgery, Istanbul Medeniyet University, Goztepe Prof. Dr. Suleyman Yalcin City Hospital, Turkey, from March 2021 to November 2022. METHODOLOGY Patients with FM and gender/age matched controls were compared with pure-tone audiometric (PTA), and transient evoked otoacoustic emissions (TEOE) tests after standardised otorhinolaryngologic assessment The subjects were questioned for NSAID uptake and scored with ASAS-NSAID score. RESULTS There were 33 patients with FM and 32 healthy volunteers. Subjective tinnitus, dizziness, and hearing loss rate in the FM group were 12%, 18%, and 15%, respectively. PTA air and bone conduction studies yielded significant differences between the control and FM group (p<0.05). The statistical difference was pronounced in higher frequencies. TEOE tests showed the FM group had significantly lower scores when compared to the control group at 3000 Hz and 4000 Hz (p<0.05). The median ASAS-NSAID scores were 0 for the control group and 7.78 for the FM group (p <0.001). CONCLUSION Patients with FM had high rate of audiometric hearing loss of the sensorineural type. The abnormalities were more prominent in the high frequencies but also present in the low frequencies. KEY WORDS Fibromyalgia syndrome, Hearing loss, Audiometry, Ototoxicity, Central sensitisation.
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Affiliation(s)
- Hanife Caglar Yagci
- Department of Physical Medicine and Rehabilitation, Istanbul Medeniyet University, Goztepe Prof. Dr. Suleyman Yalcin City Hospital, Istanbul, Turkey
| | - Osman Ilkay Ozdamar
- Department of Otorhinolaryngology-Head and Neck Surgery, Istanbul Medeniyet University, Goztepe Prof. Dr. Suleyman Yalcin City Hospital, Istanbul, Turkey
| | - Ozlem Ertugrul
- Department of Audiology, Istanbul Medeniyet University, Goztepe Prof. Dr. Suleyman Yalcin City Hospital, Istanbul, Turkey
| | - Cansu Tosyali Salman
- Department of Audiology, Istanbul Medeniyet University, Goztepe Prof. Dr. Suleyman Yalcin City Hospital, Istanbul, Turkey
| | - Ilker Yagci
- Department of Physical Medicine and Rehabilitation, Marmara University School of Medicine, Istanbul, Turkey
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Sakaki Y, Hosoya M, Nishiyama T, Wakabayashi T, Shimanuki MN, Ozawa H, Oishi N. A Case of Vestibular Schwannoma with Deafness Showing Remarkable Hearing Recovery Following Hearing-Preserving Surgery. J Int Adv Otol 2023; 19:426-430. [PMID: 37789631 PMCID: PMC10645190 DOI: 10.5152/iao.2023.221035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 05/01/2023] [Indexed: 10/05/2023] Open
Abstract
Surgery for vestibular schwannoma can be divided into hearing-preserving and nonhearing-preserving surgeries. Hearing-preserving surgery is usually not considered in patients with deafness due to vestibular schwannoma, because hearing is unlikely to improve, and surgery aims to maximize the tumor resection at the expense of hearing. We report an extremely rare case of a 46-year-old man with unilateral profound hearing loss due to a vestibular schwannoma with marked cystic degeneration in the left cistern, which significantly recovered to near-normal hearing levels after hearing-preserving surgery. Hearing loss gradually worsened, and preoperative pure-tone evaluation showed complete hearing loss in the left ear. However, the response to the distortion product otoacoustic emission was preserved, and hearing loss was considered to be retrocochlear. Tumor resection was performed using the retrolabyrinthine approach with continuous monitoring using dorsal cochlear nucleus action potential, auditory brainstem response, and facial nerve function muscle action potential. The cistern portion of the tumor was almost completely resected along with the wall. Postoperatively, the pure-tone threshold on the left side markedly improved. The present case clearly demonstrates the possibility of hearing recovery in patients with retrocochlear hearing loss. We should consider expanding the indications for hearing-preserving surgery.
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Affiliation(s)
- Yusuke Sakaki
- Department of Otolaryngology-Head and Neck Surgery, Keio University School of Medicine, Shinjuku, Tokyo, Japan
| | - Makoto Hosoya
- Department of Otolaryngology-Head and Neck Surgery, Keio University School of Medicine, Shinjuku, Tokyo, Japan
| | - Takanori Nishiyama
- Department of Otolaryngology-Head and Neck Surgery, Keio University School of Medicine, Shinjuku, Tokyo, Japan
| | - Takeshi Wakabayashi
- Department of Otolaryngology-Head and Neck Surgery, Keio University School of Medicine, Shinjuku, Tokyo, Japan
| | - Marie N. Shimanuki
- Department of Otolaryngology-Head and Neck Surgery, Keio University School of Medicine, Shinjuku, Tokyo, Japan
| | - Hiroyuki Ozawa
- Department of Otolaryngology-Head and Neck Surgery, Keio University School of Medicine, Shinjuku, Tokyo, Japan
| | - Naoki Oishi
- Department of Otolaryngology-Head and Neck Surgery, Keio University School of Medicine, Shinjuku, Tokyo, Japan
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21
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Srivastava I, Kalaiah MK, Roushan R, Shastri U, Kumar K. The effect of coffee on contralateral suppression of transient evoked otoacoustic emissions. F1000Res 2023; 11:878. [PMID: 37841827 PMCID: PMC10568215 DOI: 10.12688/f1000research.122851.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/04/2023] [Indexed: 10/17/2023] Open
Abstract
Background: Coffee is a popular non-alcoholic beverage consumed by humans across the world. It contains caffeine, which is a type of stimulant of the central nervous system. In the auditory system, it has a positive effect on auditory brainstem response and perception of speech in noise. Further, caffeine has an inhibitory effect in the cochlea, but studies have rarely investigated its effect on otoacoustic emissions (OAEs) in humans. OAEs are low-intensity sounds produced by the cochlea, which could be recorded in the ear canal. The present study was carried out to investigate the effect of coffee on transient evoked otoacoustic emission (TEOAE) and contralateral suppression of TEOAE. Method: A total of 52 young adults participated in the study. A cross-over study design was used for the present investigation. The TEOAE and contralateral suppression of TEOAE were recorded before and after consumption of coffee and milk. The contralateral suppression of TEOAE was measured by presenting white noise to the contralateral ear at 40, 50, and 60 dB sound pressure level (SPL). Results: The mean amplitude of TEOAE before and after consumption of coffee was similar in both ears. Further, the mean contralateral suppression of TEOAE was slightly larger after consumption of coffee in both ears. However, the mean difference was not significant in both the ears. Conclusions: Based on the findings of present study, coffee has no significant effect on the amplitude of TEOAE and contralateral suppression of TEOAE.
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Affiliation(s)
- Ishaan Srivastava
- Department of Audiology and Speech Language Pathology, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India
| | - Mohan Kumar Kalaiah
- Department of Audiology and Speech Language Pathology, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India
| | - Ritik Roushan
- Department of Audiology and Speech Language Pathology, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India
| | - Usha Shastri
- Department of Audiology and Speech Language Pathology, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India
| | - Kaushlendra Kumar
- Department of Audiology and Speech Language Pathology, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India
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Pyarali M, Akhtar S, Adeel M, Mallick SA, Uneeb SN, Aslam A. Neonatal Hearing Screening Programme And Challenges Faced By The Developing Country: A Tertiary Care Hospital Experience. J PAK MED ASSOC 2023; 73:1788-1793. [PMID: 37817685 DOI: 10.47391/jpma.6264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/12/2023]
Abstract
OBJECTIVE To screen new-borns to diagnose any hearing impairment early. METHODS The prospective, cross-sectionalstudy was conducted at the Department of Otorhinolaryngology, Head and Neck Surgery Liaquat National Hospital, Karachi, from November 1, 2020, to April 30, 2021, and new- borns of either gender aged >12h born via spontaneous vaginal delivery, induced labour, and Caesarean section. A predesigned questionnaire was used to collect detailed case history, including gestational age, duration of labour, and other prenatal, natal, and postnatal risk factors. Otoacoustic emission test was performed, and infants referred twice were scheduled for complete diagnostic evaluation and brainstem evoked response audiometry. Data was analysed using SPSS 23. RESULTS Of the 267 neonates, 249(93.3%) passed the first screening. Of the remaining 18(6.7%) neonates, 8(44.4%) passed the second screening, while 10(55.5%) were asked to come for a follow-up after three weeks. Of them, 3(30%) returned for check-up, while 7(70%) did not show up. CONCLUSIONS Neonatal risk factors associated with hearing loss need to be identified, and a comprehensive hearing screening programme is required for neonates.
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Affiliation(s)
- Maheen Pyarali
- Department of ENT and Headand Neck Surgery,Liaquat National Hospital and Medical College, Karachi,Pakistan
| | - Saeed Akhtar
- Department of ENT and Headand Neck Surgery,Liaquat National Hospital and Medical College, Karachi,Pakistan
| | - Maira Adeel
- Department of ENT and Headand Neck Surgery,Liaquat National Hospital and Medical College, Karachi,Pakistan
| | - Shabbir Ahmed Mallick
- Department of Peadiatrics, Neonatology and Metabolic disorders,Liaquat National Hospital and Medical College, Karachi,Pakistan
| | - Saher Naseeb Uneeb
- Department of Paediatrics and Child Health, Aga Khan University Hospital, Karachi,Pakistan
| | - Afshan Aslam
- Department of ENT and Headand Neck Surgery,Liaquat National Hospital and Medical College, Karachi,Pakistan
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23
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Jin HR, Kim D, Rim HS, Yeo SG. Acoustic differences in tinnitus between noise-induced and non-noise-induced hearing loss. Acta Otolaryngol 2023; 143:766-771. [PMID: 37897331 DOI: 10.1080/00016489.2023.2266471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 09/26/2023] [Indexed: 10/30/2023]
Abstract
BACKGROUND Tinnitus, the perception of sound without external stimuli, varies across hearing loss types. The present study compared the acoustic characteristics of tinnitus in patients with noise-induced hearing loss (NIHL) and in those with hearing loss unrelated to noise exposure. OBJECTIVE This study compared the acoustic characteristics of tinnitus in patients with noise-induced and non-noise-induced hearing loss. METHODS A total of 403 patients with tinnitus were divided into those with noise-induced and non-noise-induced hearing loss. Patients were evaluated by pure tone audiometry (PTA), tinnitogram, transient evoked otoacoustic emission (TEOAE), distortion product otoacoustic emission (DPOAE), and auditory brainstem evoked response (ABR) tests. RESULTS Patients with NIHL exhibited significantly higher hearing thresholds across all frequencies (125-8000 Hz) (p < .05) and reported significantly higher tinnitus intensity (p < .05). Otoacoustic emission tests showed that response rates were significantly lower (p < .05), and ABR tests found that latency periods were significantly more prolonged (p < .05), in patients with NIHL. CONCLUSIONS Tinnitus differs acoustically between patients with NIHL and those with non-noise-induced hearing loss, with specific patterns of intensity and auditory responses. These findings emphasize the need for tailoring the management of tinnitus according to the underlying type of hearing loss.
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Affiliation(s)
- Hye Rim Jin
- Department of Otorhinolaryngology Head & Neck Surgery, Kyung Hee University College of Medicine, Kyung Hee University Hospital, Seoul, Republic of Korea
| | - Dokyoung Kim
- Department of Anatomy and Neurobiology, College of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Hwa Sung Rim
- Department of Otorhinolaryngology Head & Neck Surgery, Kyung Hee University College of Medicine, Kyung Hee University Hospital, Seoul, Republic of Korea
| | - Seung Geun Yeo
- Department of Otorhinolaryngology Head & Neck Surgery, Kyung Hee University College of Medicine, Kyung Hee University Hospital, Seoul, Republic of Korea
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24
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Lewis JD. Model-based prediction of otoacoustic emission level, noise level, and signal-to-noise ratio during time-synchronous averaging. J Acoust Soc Am 2023; 154:709-720. [PMID: 37550237 DOI: 10.1121/10.0020568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 07/20/2023] [Indexed: 08/09/2023]
Abstract
Although averaging is effective in reducing noise, its efficiency rapidly decreases beyond several hundred averages. Depending on environmental and patient noise levels, several hundred averages may be insufficient for informed clinical decision making. The predictable nature of the otoacoustic emission (OAE) and noise during time-synchronous averaging implicates the use of predictive modeling as an alternative to increased averaging when noise is high. Click-evoked OAEs were measured in 98, normal-hearing subjects. Average OAE and noise levels were calculated for subsets of the total number of averages and then fit using variants of a power function. The accuracy of the models was quantified as the difference between the measured value and model output. Models were used to predict the OAE signal-to-noise ratio (SNR) for a criterion noise level. Based on predictions, the OAE was categorized as present or absent. Model-based decisions were compared to decisions from direct measurements. Model accuracy improved as the number of averages (and SNR in the case of OAEs) from which the model was derived increased. Model-based classifications permitted correct categorization of the OAE status from fewer averages than measurement-based classifications. Furthermore, model-based predictions resulted in fewer false positives (i.e., absent OAE despite normal hearing).
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Affiliation(s)
- James D Lewis
- Department of Audiology and Speech Pathology, University of Tennessee Health Science Center, Knoxville, Tennessee 37996, USA
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25
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Cheatham MA. Distortion Product Otoacoustic Emissions in Mice Above and Below the Eliciting Primaries. J Assoc Res Otolaryngol 2023; 24:413-428. [PMID: 37464091 PMCID: PMC10504173 DOI: 10.1007/s10162-023-00903-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 06/14/2023] [Indexed: 07/20/2023] Open
Abstract
Normal hearing is associated with cochlear nonlinearity. When two tones (f1 and f2) are presented, the intracochlear response contains additional components that can be recorded from the ear canal as distortion product otoacoustic emissions (DPOAEs). Although the most prominent intermodulation distortion component is at 2f1-f2, other cubic distortion products are also generated. Because these measurements are noninvasive, they are used in humans and in animal models to detect hearing loss. This study evaluated how loss of sensitivity affects DPOAEs with frequencies above and below the stimulating primaries, i.e., for upper sideband (USB) components like 2f2-f1 and for lower sideband (LSB) components like 2f1-f2. DPOAEs were recorded in several mouse mutants with varying degrees of hearing loss associated with structural changes to the tectorial membrane (TM), or with loss of outer hair cell (OHC) somatic electromotility due to lack of prestin or to the expression of a non-functional prestin. In mice with changes in sensitivity, magnitude reductions were observed for 2f1-f2 relative to controls with mice lacking prestin showing the greatest changes. In contrast, 2f2-f1 was minimally affected by reductions in cochlear gain due to changes in the TM or by the loss of OHC somatic electromotility. In addition, TM mutants with spontaneous otoacoustic emissions (SOAEs) generated larger responses than controls at 2f2-f1 when its frequency was similar to that for the SOAEs. Although cochlear pathologies appear to affect USB and LSB DPOAEs in different ways, both 2f1-f2 and 2f2-f1 reflect nonlinearities associated with the transducer channels. However, in mice, the component at 2f2-f1 does not appear to receive enhancement due to prestin's motor action.
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Affiliation(s)
- Mary Ann Cheatham
- The Knowles Hearing Center, Roxelyn and Richard Pepper Department of Communication Sciences and Disorders, Northwestern University, 2-240 Frances Searle Building, 2240 Campus Drive, Evanston, IL, 60208, USA.
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26
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Arruda de Souza Alcarás P, Alves Corazza MC, Vianna L, Miranda de Araujo C, Alves Corazza L, Zeigelboim BS, Moreira de Lacerda AB. Auditory and Vestibular Findings in Brazilian Adults Affected by COVID-19: An Exploratory Study. Audiol Neurootol 2023; 28:466-477. [PMID: 37490870 DOI: 10.1159/000531207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 05/15/2023] [Indexed: 07/27/2023] Open
Abstract
INTRODUCTION The aim of the study was to describe auditory and vestibular findings in Brazilian adults after COVID-19 in a municipality from the outskirts of the São Paulo state. METHODS This was a transversal and exploratory study comprising sixteen participants infected by the SARS-CoV-2 virus, confirmed through RT-PCR detection, aged 20 to 55 years. Subjects underwent anamnesis, vestibular and auditory testing. Fisher's exact test was used to evaluate medication use, chemical and physical exposure, and occupational risk and McNemar test was used to compare auditory and vestibular symptoms pre- and post-COVID-19. RESULTS Most patients were women (75%) and had been exposed to the virus over 90 days before testing (50%). 18.8% used hydroxychloroquine, 68.8% used ivermectin, and 87.5% used azithromycin to treat COVID-19. Auditory complaints were reported by 31.2% and vestibular by 18.7%. There was no statistical difference before and after the disease. Other reported symptomatology was hair loss, pain, fatigue, memory loss, difficulty to concentrate, and headache. Auditory findings were relevant in contralateral acoustic reflex, in the distortion-product otoacoustic emissions, and in the brainstem auditory evoked potential, characterizing a neurosensorial compromise. 43.74% of patients had altered vectonystagmography. When comparing both ears, no statistical relevance was found; however, when results were crossed with medication use and exposures, there was statistical relevance in the amplitude of the V wave for medications and absolute latency of the V wave to exposure to physical agents. DISCUSSION/CONCLUSION This study demonstrated auditory and vestibular findings of neurosensorial nature, considering hearing and of a peripheral vestibulopathy. As it is a study of transversal nature, it is not possible to extend results to general population; yet it may be a finding to future studies.
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Affiliation(s)
| | - Maria Cristina Alves Corazza
- Post-Graduate Program in Communication Disorders, Tuiuti University of Paraná, Curitiba, Brazil
- Faculty of Medicine, University of Western São Paulo, Presidente Prudente, Brazil
| | - Larissa Vianna
- Post-Graduate Program in Communication Disorders, Tuiuti University of Paraná, Curitiba, Brazil
| | | | - Luíza Alves Corazza
- Neurology Department, Hospital Santa Marcelina de Itaquera, São Paulo, São Paulo, Brazil
| | | | - Adriana Bender Moreira de Lacerda
- Post-Graduate Program in Communication Disorders, Tuiuti University of Paraná, Curitiba, Brazil
- l'École d'Orthophonie et d'Audiologie, Université de Montreal (CA), Montreal, Québec, Canada
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Kim JM, Rim HS, Kim SS, Kim SH, Byun JY, Yeo SG. Comparative study of SSNHL with and without tinnitus: audiologic and hematologic differences. Acta Otolaryngol 2023; 143:589-595. [PMID: 37435834 DOI: 10.1080/00016489.2023.2229376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 06/18/2023] [Accepted: 06/19/2023] [Indexed: 07/13/2023]
Abstract
BACKGROUND AND OBJECTIVES Tinnitus is one of the most common symptoms of sudden sensorineural hearing loss (SSNHL), with the incidence of tinnitus in patients with SSNHL ranging from 60% to 90%. Little is known, however, about the specific audiologic and hematologic factors that may be associated with the development of tinnitus. To better understand the relationship between tinnitus and SSNHL, the present study compared audiologic and hematologic factors in SSNHL patients with tinnitus and without tinnitus. SUBJECTS AND METHOD The present study compared 120 patients with SSNHL with tinnitus and 59 patients with SSNHL without tinnitus at their initial examination. Their audiology and hematologic test results were analyzed, and hearing recovery was determined by comparing the hearing thresholds before and after treatment. RESULTS 120 patients with tinnitus showed longer III and V latency in auditory brainstem response (ABR) tests, lower signal-to-noise ratios (SNR) at 2 kHz in transient evoked otoacoustic emissions (TEOAE) tests, and lower response rates at 2 kHz in distortion product otoacoustic emissions (DPOAE) tests of the affected ear (p < 0.05 each) than the 59 patients without tinnitus. However, there were no significant between-group differences in the mean hearing threshold and hearing recovery rate of the affected ear. Patients with tinnitus had significantly worse mean hearing thresholds and hearing thresholds at 4 kHz in the nonaffected ear. The percentages of monocytes and large unstained cells (%LUCs) were higher in the group without tinnitus (p < 0.05), although there were no significant between-group differences in inflammatory markers, such as neutrophil-to-lymphocyte ratio (NLR), monocyte-to-lymphocyte ratio (MLR) and platelet-to-lymphocyte ratio (PLR). CONCLUSION Tinnitus accompanying SSNHL may be associated with baseline hearing level, as well as being an indicator of damage to outer hair cells and auditory nerves. Additional studies are needed to evaluate hematologic data in SSNHL patients with and without tinnitus.
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Affiliation(s)
- Jung Min Kim
- Department of Otorhinolaryngology, Head and Neck Surgery, College of Medicine, Kyung Hee University Hospital, Seoul, Republic of Korea
| | - Hwa Sung Rim
- Department of Otorhinolaryngology, Head and Neck Surgery, College of Medicine, Kyung Hee University Hospital, Seoul, Republic of Korea
| | - Sung Soo Kim
- Department of Biochemistry and Molecular Biology, School of Medicine, Kyung Hee University, Seoul, Korea
| | - Sang Hoon Kim
- Department of Otorhinolaryngology, Head and Neck Surgery, College of Medicine, Kyung Hee University Hospital, Seoul, Republic of Korea
| | - Jae Yong Byun
- Department of Otorhinolaryngology, Head and Neck Surgery, College of Medicine, Kyung Hee University Hospital, Seoul, Republic of Korea
| | - Seung Geun Yeo
- Department of Otorhinolaryngology, Head and Neck Surgery, College of Medicine, Kyung Hee University Hospital, Seoul, Republic of Korea
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28
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Bhatt IS, Lichtenhan J, Tyler R, Goodman S. Influence of tinnitus, lifetime noise exposure, and firearm use on hearing thresholds, distortion product otoacoustic emissions, and their relative metric. J Acoust Soc Am 2023; 154:418-432. [PMID: 37477366 PMCID: PMC10362977 DOI: 10.1121/10.0019880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 05/22/2023] [Accepted: 06/10/2023] [Indexed: 07/22/2023]
Abstract
Distortion product otoacoustic emissions (DPOAEs) and hearing thresholds (HTs) are widely used to evaluate auditory physiology. DPOAEs are sensitive to cochlear amplification processes, while HTs are additionally dependent upon inner hair cells, synaptic junctions, and the auditory nervous system. These distinctions between DPOAEs and HTs might help differentially diagnose auditory dysfunctions. This study aims to differentially diagnose auditory dysfunctions underlying tinnitus, firearm use, and high lifetime noise exposure (LNE) using HTs, DPOAEs, and a derived metric comparing HTs and DPOAEs, in a sample containing overlapping subgroups of 133 normal-hearing young adults (56 with chronic tinnitus). A structured interview was used to evaluate LNE and firearm use. Linear regression was used to model the relationship between HTs and DPOAEs, and their regression residuals were used to quantify their relative agreement. Participants with chronic tinnitus showed significantly elevated HTs, yet DPOAEs remained comparable to those without tinnitus. In contrast, firearm users revealed elevated HTs and significantly lower DPOAEs than predicted from HTs. High LNE was associated with elevated HTs and a proportional decline in DPOAEs, as predicted from HTs. We present a theoretical model to interpret the findings, which suggest neural (or synaptic) dysfunction underlying tinnitus and disproportional mechanical dysfunction underlying firearm use.
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Affiliation(s)
- Ishan Sunilkumar Bhatt
- Department of Communication Sciences & Disorders, University of Iowa, Iowa City, Iowa 52242, USA
| | - Jeffery Lichtenhan
- Department of Otolaryngology-Head and Neck Surgery, University of South Florida, Tampa, Florida 33612, USA
| | - Richard Tyler
- Department of Communication Sciences & Disorders, University of Iowa, Iowa City, Iowa 52242, USA
| | - Shawn Goodman
- Department of Communication Sciences & Disorders, University of Iowa, Iowa City, Iowa 52242, USA
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29
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Mertes IB, Marquess A. A Survey of U.S. Audiologists' Usage of and Attitudes Toward Otoacoustic Emissions. Am J Audiol 2023; 32:417-431. [PMID: 37099746 DOI: 10.1044/2023_aja-22-00096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2023] Open
Abstract
PURPOSE Otoacoustic emissions (OAEs) provide information on outer hair cell function and have multiple clinical applications. Two types of OAEs, transient-evoked OAEs (TEOAEs) and distortion product OAEs (DPOAEs), are currently utilized in clinical practice. However, it remains unknown how confident U.S. clinicians are in performing and interpreting TEOAEs and DPOAEs. Additionally, the extent to which U.S. audiologists incorporate OAEs for different clinical applications and populations has not been thoroughly investigated. To fill these gaps in knowledge, this study characterized the attitudes toward and usage of TEOAEs and DPOAEs in a sample of U.S. audiologists. METHOD This study utilized an online survey distributed to U.S. audiologists through multiple channels from January to March 2021. A total of 214 completed surveys were included in the analysis. Results were analyzed descriptively. Associations between variables and comparisons between users of DPOAEs only and users of TEOAEs and DPOAEs were also examined. RESULTS DPOAEs were reportedly utilized more frequently and with greater confidence than TEOAEs. The most common clinical application of both OAE types was a cross-check. Significant associations were found between responses to DPOAE questions and the clinician's setting and patient age. There were some significant differences between users of DPOAEs only and users of TEOAEs and DPOAEs. CONCLUSIONS Results suggest that U.S. audiologists utilize OAEs for multiple clinical purposes and that there are appreciable differences in terms of attitudes toward and usage of DPOAEs versus TEOAEs. Future work could investigate the reasons that underlie these differences to further improve clinical implementation of OAEs.
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Affiliation(s)
- Ian B Mertes
- Department of Speech and Hearing Science, University of Illinois Urbana-Champaign, Champaign
| | - Ali Marquess
- Department of Speech and Hearing Science, University of Illinois Urbana-Champaign, Champaign
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30
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Lewis JD, Goettl-Meyer M, Lee D. Medial Olivocochlear Reflex Strength in Ears With Low-to-Moderate Annual Noise Exposure. J Speech Lang Hear Res 2023; 66:1428-1443. [PMID: 36940474 DOI: 10.1044/2022_jslhr-22-00433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
PURPOSE Studies in lower mammals demonstrate enhancement of the medial olivocochlear reflex (MOCR) following noise exposure. A similar effect may occur in humans, and there is some evidence of an individual's acoustic history affecting the MOCR. The current work evaluates the relationship between an individual's annual noise exposure history and their MOCR strength. Given the potential role of the MOCR as a biological hearing protector, it is important to identify factors associated with MOCR strength. METHOD Data were collected from 98 normal-hearing young adults. Annual noise exposure history was estimated using the Noise Exposure Questionnaire. MOCR strength was assayed using click-evoked otoacoustic emissions (CEOAEs) measured with and without noise presented to the contralateral ear. MOCR metrics included the MOCR-induced otoacoustic emission (OAE) magnitude shift and phase shift. A CEOAE signal-to-noise ratio (SNR) of at least 12 dB was required for estimation of the MOCR metrics. Linear regression was applied to evaluate the relationship between MOCR metrics and annual noise exposure. RESULTS Annual noise exposure was not a statistically significant predictor of the MOCR-induced CEOAE magnitude shift. However, annual noise exposure was a statistically significant predictor of the MOCR-induced CEOAE phase shift-the MOCR-induced phase shift decreased with increasing noise exposure. Additionally, annual noise exposure was a statistically significant predictor of OAE level. CONCLUSIONS Findings contrast with recent work that suggests MOCR strength increases with annual noise exposure. Compared with previous work, data for this study were collected using more stringent SNR criteria, which is expected to increase the precision of the MOCR metrics. Additionally, data were collected for a larger subject population with a wider range of noise exposures. Whether findings generalize to other exposure durations and levels is unknown and requires future study.
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Affiliation(s)
- James D Lewis
- Department of Audiology and Speech Pathology, The University of Tennessee Health Science Center, Knoxville
| | - Morgaine Goettl-Meyer
- Department of Physiology and Biophysics, University of Colorado Anschutz Medical Campus, Aurora
| | - Donguk Lee
- Department of Audiology and Speech Pathology, The University of Tennessee Health Science Center, Knoxville
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Salloom WB, Bharadwaj H, Strickland EA. The effects of broadband elicitor duration on a psychoacoustic measure of cochlear gain reduction. J Acoust Soc Am 2023; 153:2482. [PMID: 37092950 PMCID: PMC10257528 DOI: 10.1121/10.0017925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 03/31/2023] [Accepted: 04/07/2023] [Indexed: 05/03/2023]
Abstract
Physiological and psychoacoustic studies of the medial olivocochlear reflex (MOCR) in humans have often relied on long duration elicitors (>100 ms). This is largely due to previous research using otoacoustic emissions (OAEs) that found multiple MOCR time constants, including time constants in the 100s of milliseconds, when elicited by broadband noise. However, the effect of the duration of a broadband noise elicitor on similar psychoacoustic tasks is currently unknown. The current study measured the effects of ipsilateral broadband noise elicitor duration on psychoacoustic gain reduction estimated from a forward-masking paradigm. Analysis showed that both masker type and elicitor duration were significant main effects, but no interaction was found. Gain reduction time constants were ∼46 ms for the masker present condition and ∼78 ms for the masker absent condition (ranging from ∼29 to 172 ms), both similar to the fast time constants reported in the OAE literature (70-100 ms). Maximum gain reduction was seen for elicitor durations of ∼200 ms. This is longer than the 50-ms duration which was found to produce maximum gain reduction with a tonal on-frequency elicitor. Future studies of gain reduction may use 150-200 ms broadband elicitors to maximally or near-maximally stimulate the MOCR.
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Affiliation(s)
- William B Salloom
- Department of Speech Language and Hearing Sciences, Purdue University, West Lafayette, Indiana 47907, USA
| | - Hari Bharadwaj
- Department of Speech Language and Hearing Sciences, Purdue University, West Lafayette, Indiana 47907, USA
| | - Elizabeth A Strickland
- Department of Speech Language and Hearing Sciences, Purdue University, West Lafayette, Indiana 47907, USA
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Niemczak CE, Ealer C, Fellows A, Magohe A, Gui J, Rieke C, Nicol T, Massawe ER, Kraus N, Buckey JC. Peripheral Auditory Function in Tanzanian Children Living With HIV With Clinically Normal Hearing. JAMA Netw Open 2023; 6:e233061. [PMID: 36920392 PMCID: PMC10018326 DOI: 10.1001/jamanetworkopen.2023.3061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/16/2023] Open
Abstract
IMPORTANCE Despite normal audiometry, adults living with HIV have lower distortion product otoacoustic emissions (DPOAEs) compared with HIV-negative controls, but the degree of these differences in children living with HIV is unknown. If subclinical auditory deficits are present, results could affect developmental outcomes in children living with HIV (CLWH). OBJECTIVE To compare DPOAEs and auditory brainstem responses (ABR) between 2 age- and sex-matched groups of younger children with normal audiometry, 1 infected with HIV and the other uninfected. DESIGN, SETTING, AND PARTICIPANTS Cohort study in an infectious disease center in Dar es Salaam, Tanzania. Participants included 340 Tanzanian children aged 3 to 9 years with clinically normal hearing, type A tympanograms bilaterally, and air-conduction thresholds of 20 dB HL or less from 0.5 to 8 kHz. Participants in the cohort repeated testing approximately every 6 months (approximately 2.2 sessions per participant) for a total of 744 total observations. Data were analyzed from March 2020 to January 2022. MAIN OUTCOMES AND MEASURES DPOAE amplitudes from 1.5 to 8 kHz using an f2 to f1 ratio of 1.2 and L1/L2 values of 65/55 dB sound pressure level and click-evoked ABR using a slow (21.1/s) and fast (61.1/s) click rate. RESULTS A total of 141 CLWH (70 female participants [49.3%]; mean [SD] age, 7.24 [1.67] years) and 199 HIV-negative individuals (99 female participants [49.7%]; mean [SD] age, 7.26 [1.44] years) participated in the study. The groups did not differ significantly in age, static immittance, or air-conduction thresholds. HIV status was independently associated with approximately 1.4 dB (95% CI, -3.28 to 0.30 dB) to 3.8 dB (95% CI, 6.03 to -1.99 dB) lower DPOAE amplitudes at 6 and 8 kHz bilaterally and 0.28 μV (95% CI, 0.01 to 0.33 μV) lower ABR wave V amplitudes in the right ear. CONCLUSIONS AND RELEVANCE Consistent with previous findings in young adults, CLWH had slightly, but reliably, lower DPOAEs and ABR wave V amplitudes than HIV-negative controls. The magnitude of these differences was small, but results suggest an early and consistent association between HIV infection or treatment and outer hair cell and auditory brainstem responses in children as young as 3 years. These subclinical changes suggest tracking both auditory function and development outcomes in CLWH is warranted.
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Affiliation(s)
- Christopher E. Niemczak
- Department of Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire
- Space Medicine Innovations Laboratory, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
| | - Christin Ealer
- Space Medicine Innovations Laboratory, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
| | - Abigail Fellows
- Space Medicine Innovations Laboratory, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
| | - Albert Magohe
- Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Jiang Gui
- Department of Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire
- Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Catherine Rieke
- Space Medicine Innovations Laboratory, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
| | - Trent Nicol
- Auditory Neuroscience Laboratory, Department of Communication Sciences, Northwestern University, Evanston, Illinois
| | - Enica R. Massawe
- Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania
| | - Nina Kraus
- Auditory Neuroscience Laboratory, Department of Communication Sciences, Northwestern University, Evanston, Illinois
- Auditory Neuroscience Laboratory, Departments of Communication Sciences, Neurobiology and Otolaryngology, Northwestern University, Evanston, Illinois
| | - Jay C. Buckey
- Department of Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire
- Space Medicine Innovations Laboratory, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
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Bramhall NF, Kampel SD, Reavis KM, Martin DK. Contralateral inhibition of distortion product otoacoustic emissions in young noise-exposed Veterans. J Acoust Soc Am 2022; 152:3562. [PMID: 36586855 PMCID: PMC10857792 DOI: 10.1121/10.0016590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Although animal models show a clear link between noise exposure and damage to afferent cochlear synapses, the relationship between noise exposure and efferent function appears to be more complex. Animal studies indicate that high intensity noise exposure reduces efferent medial olivocochlear (MOC) reflex strength, whereas chronic moderate noise exposure is associated with a conditioning effect that enhances the MOC reflex. The MOC reflex is predicted to improve speech-in-noise perception and protects against noise-induced auditory damage by reducing cochlear gain. In humans, MOC reflex strength can be estimated by measuring contralateral inhibition of distortion product otoacoustic emissions (DPOAEs). The objective of this study was to determine the impact of military noise exposure on efferent auditory function by measuring DPOAE contralateral inhibition in young Veterans and non-Veterans with normal audiograms. Compared with non-Veteran controls, Veterans with high levels of reported noise exposure demonstrated a trend of reduced contralateral inhibition across a broad frequency range, suggesting efferent damage. Veterans with moderate noise exposure showed trends of reduced inhibition from 3 to 4 kHz but greater inhibition from 1 to 1.5 kHz, consistent with conditioning. These findings suggest that, in humans, the impact of noise exposure on the MOC reflex differs depending on the noise intensity and duration.
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Affiliation(s)
- Naomi F. Bramhall
- VA RR&D National Center for Rehabilitative Auditory Research (NCRAR), VA Portland Health Care System, Portland, OR 97239, USA
| | - Sean D. Kampel
- VA RR&D National Center for Rehabilitative Auditory Research (NCRAR), VA Portland Health Care System, Portland, OR 97239, USA
| | - Kelly M. Reavis
- VA RR&D National Center for Rehabilitative Auditory Research (NCRAR), VA Portland Health Care System, Portland, OR 97239, USA
| | - Dawn Konrad Martin
- VA RR&D National Center for Rehabilitative Auditory Research (NCRAR), VA Portland Health Care System, Portland, OR 97239, USA
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Trevino M, Escabi C, Swanner H, Pawlowski K, Lobarinas E. No Reduction in the 226-Hz Probe Tone Acoustic Reflex Amplitude Following Severe Inner Hair Cell Loss in Chinchillas. J Assoc Res Otolaryngol 2022; 23:593-602. [PMID: 35902434 PMCID: PMC9613837 DOI: 10.1007/s10162-022-00861-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 07/04/2022] [Indexed: 11/30/2022] Open
Abstract
The relationship between the middle ear acoustic reflex (AR) and inner hair cell (IHC) loss is currently unknown. Given that IHC are believed to convey nearly all acoustic information to the central auditory nervous system, it has been assumed that loss of IHC would significantly impact the AR. To evaluate this relationship, we assessed the presence and amplitude of the AR in chinchillas before and after treatment with carboplatin, an anticancer drug that reliably and selectively destroys IHC in this species. Baseline measures of hearing sensitivity, including auditory brainstem response (ABR) thresholds and distortion product otoacoustic emissions (DPOAE), were assessed and then re-evaluated following carboplatin treatment. Post-carboplatin ABR thresholds and DPOAE were found to be unchanged or slightly elevated; results were consistent with published reports. Our main hypothesis was that loss of IHC would abolish the reflex or significantly reduce its amplitude. Contrary to our hypothesis, the ipsilateral 226-Hz AR continued to be reliably elicited following carboplatin treatment. Post-mortem histological analysis confirmed significant IHC loss (65-85 %), but no measurable loss of outer hair cells (OHCs). Given that loss of IHC alone does not significantly reduce the 226-Hz AR, our results suggest that few IHC are needed to maintain the 226-Hz AR response. These results suggest additional studies are needed to better understand the role of IHC in the reflex arc, present opportunities to further study the reflex pathway, and could change how we use the clinical AR as a potential diagnostic tool for IHC dysfunction, including those related to IHC synaptopathy.
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Affiliation(s)
- Monica Trevino
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Richardson, TX USA
| | - Celia Escabi
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Richardson, TX USA
| | - Hannah Swanner
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Richardson, TX USA
| | - Karen Pawlowski
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Richardson, TX USA
| | - Edward Lobarinas
- School of Behavioral and Brain Sciences, The University of Texas at Dallas, Richardson, TX USA
- Callier Center for Communication Disorders, The University of Texas at Dallas, 1966 Inwood Road, Dallas, TX 75235 USA
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35
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Jedrzejczak WW, Milner R, Pilka E, Ganc M, Skarzynski H. Visual attention does not affect the reliability of otoacoustic emission or medial olivocochlear reflex. J Acoust Soc Am 2022; 152:2398. [PMID: 36319231 DOI: 10.1121/10.0014900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 09/29/2022] [Indexed: 06/16/2023]
Abstract
This study investigated whether visual attention affects the reliability (i.e., repeatability) of transiently evoked otoacoustic emission (TEOAE) magnitudes or of medial olivocochlear reflex (MOCR) estimates. TEOAEs were measured during three visual attentional conditions: control (subject were seated with eyes closed); passive (subjects looked at a pattern of squares on a computer screen); and active (subjects silently counted an occasionally inverted pattern). To estimate reliability, the whole recording session was repeated the next day. The results showed that visual attention does not significantly affect TEOAE or MOCR magnitudes-or their reliability. It is therefore possible to employ visual stimuli (e.g., watching a silent movie) during TEOAE experiments, a procedure sometimes used during testing to prevent subjects from falling asleep or to keep children still and quiet.
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Affiliation(s)
- W Wiktor Jedrzejczak
- World Hearing Center, Institute of Physiology and Pathology of Hearing, ulica Mokra 17, Kajetany 05-830 Nadarzyn, Poland
| | - Rafal Milner
- World Hearing Center, Institute of Physiology and Pathology of Hearing, ulica Mokra 17, Kajetany 05-830 Nadarzyn, Poland
| | - Edyta Pilka
- World Hearing Center, Institute of Physiology and Pathology of Hearing, ulica Mokra 17, Kajetany 05-830 Nadarzyn, Poland
| | - Malgorzata Ganc
- World Hearing Center, Institute of Physiology and Pathology of Hearing, ulica Mokra 17, Kajetany 05-830 Nadarzyn, Poland
| | - Henryk Skarzynski
- World Hearing Center, Institute of Physiology and Pathology of Hearing, ulica Mokra 17, Kajetany 05-830 Nadarzyn, Poland
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36
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Pinsonnault-Skvarenina A, Soucy W, Noël J, Doucet F, Lévesque É, Fuente A, Leroux T. Supra-threshold deficits in normal hearing military recruits exposed to impulse noise. J Acoust Soc Am 2022; 152:2419. [PMID: 36319241 DOI: 10.1121/10.0014829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 09/23/2022] [Indexed: 06/16/2023]
Abstract
The aim of this study was to determine the effect of impulse noise exposure on various proxy measures of cochlear synaptopathy in young military recruits. A total of 27 military recruits with exposure to firearm and artillery noise and 13 non exposed participants were recruited. All presented with normal hearing thresholds and the presence of distortion product otoacoustic emissions (DPOAEs). The Noise Exposure Structured Interview (NESI) was used to quantify noise exposure. Speech perception in noise (SPiN), equivalent rectangular bandwidth (ERB) of auditory filters, auditory brainstem response wave I amplitude, wave I amplitude growth function, wave I/V amplitude ratio, wave V latency, wave V latency shift with ipsilateral noise, and the summating potential/action potential ratio of the electrocochleography were measured. In military participants, SPiN was worse, ERB at 4 kHz was larger, wave I amplitude at 75 dBnHL was reduced, and wave V latency was delayed. However, no significant correlations were observed between NESI and auditory measures, once multiplicity of tests was controlled for. These results suggest that military recruits may exhibit supra-threshold deficits, despite presenting with normal hearing thresholds and presence of DPOAEs. Future studies should include a measure of auditory filters in their test battery.
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Affiliation(s)
| | - William Soucy
- École d'orthophonie et d'audiologie, Faculté de médecine, Université de Montréal, Montréal, Québec, H3C 3J7, Canada
| | - Jonathan Noël
- École d'orthophonie et d'audiologie, Faculté de médecine, Université de Montréal, Montréal, Québec, H3C 3J7, Canada
| | - Félicia Doucet
- École d'orthophonie et d'audiologie, Faculté de médecine, Université de Montréal, Montréal, Québec, H3C 3J7, Canada
| | - Élise Lévesque
- École d'orthophonie et d'audiologie, Faculté de médecine, Université de Montréal, Montréal, Québec, H3C 3J7, Canada
| | - Adrian Fuente
- École d'orthophonie et d'audiologie, Faculté de médecine, Université de Montréal, Montréal, Québec, H3C 3J7, Canada
| | - Tony Leroux
- École d'orthophonie et d'audiologie, Faculté de médecine, Université de Montréal, Montréal, Québec, H3C 3J7, Canada
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37
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Stahl AN, Mondul JA, Alek KA, Hackett TA, Ramachandran R. Audiologic characterization using clinical physiological measures: Normative data from macaque monkeys. Hear Res 2022; 424:108568. [PMID: 35896044 PMCID: PMC9529828 DOI: 10.1016/j.heares.2022.108568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 06/28/2022] [Accepted: 07/08/2022] [Indexed: 12/16/2022]
Abstract
Clinical auditory physiological measures (e.g., auditory brainstem responses, ABRs, and distortion product otoacoustic emissions, DPOAEs) provide diagnostic specificity for differentially diagnosing overt hearing impairments, but they remain limited in their ability to detect specific sites of lesion and subtle levels of cochlear damage. Studies in animal models may hold the key to improve differential diagnosis due to the ability to induce tightly controlled and histologically verifiable subclinical cochlear pathologies. Here, we present a normative set of traditional and clinically novel physiological measures using ABRs and DPOAEs measured in a large cohort of male macaque monkeys. Given the high similarities between macaque and human auditory anatomy, physiology, and susceptibility to hearing damage, this normative data set will serve as a crucial baseline to investigate novel physiological measures to improve diagnostics. DPOAE amplitudes were robust at f2 = 1.22, L1/L2 = 65/55, increased with frequency up to 10 kHz, and exhibited high test re-test reliability. DPOAE thresholds were lowest from 2-10 kHz and highest < 2 kHz. ABRs with a standard clinical electrode montage (vertex-to-mastoid, VM) produced Waves I-IV with a less frequently observed Wave-I, and lower thresholds. ABRs with a vertex-to-tympanic membrane (VT) electrode montage produced a more robust Wave-I, but absent Waves II-IV and higher thresholds. Further study with the VM montage revealed amplitudes that increased with stimulus level and were largest in response to click stimuli, with Wave-II showing the largest ABR amplitude, followed by -IV and -I, with high inter- and intra-subject variability. ABR wave latencies decreased with stimulus level and frequency. When stimulus presentation rate increased or stimuli were presented in close temporal proximity, ABR amplitude decreased, and latency increased. These findings expand upon existing literature of normative clinical physiological data in nonhuman primates and lay the groundwork for future studies investigating the effects of noise-induced pathologies in macaques.
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Affiliation(s)
- Amy N Stahl
- Vanderbilt Neuroscience Graduate Program, Vanderbilt University, Nashville, TN 37212; Vanderbilt Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, Nashville, TN 37212.
| | - Jane A Mondul
- Vanderbilt Neuroscience Graduate Program, Vanderbilt University, Nashville, TN 37212; Vanderbilt Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, Nashville, TN 37212.
| | - Katy A Alek
- Vanderbilt Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, Nashville, TN 37212.
| | - Troy A Hackett
- Vanderbilt Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, Nashville, TN 37212.
| | - Ramnarayan Ramachandran
- Vanderbilt Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, Nashville, TN 37212.
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Snapp HA, Schaefer Solle N, Millet B, Rajguru SM. Subclinical Hearing Deficits in Noise-Exposed Firefighters. Int J Environ Res Public Health 2022; 19:11028. [PMID: 36078744 PMCID: PMC9518181 DOI: 10.3390/ijerph191711028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 08/24/2022] [Accepted: 08/30/2022] [Indexed: 06/15/2023]
Abstract
Noise-induced hearing loss (NIHL) is the most prevalent occupational disease in the world and firefighters are at increased risk of NIHL due to their frequent exposure to hazardous levels of noise during service. Adverse effects of NIHL include acceleration of age-related hearing loss and an increased risk of cognitive decline. A critical challenge in addressing NIHL is the delayed clinical presentation of symptoms and lack of sensitive tools for early detection. To study the early clinical symptoms of NIHL in this high-risk group, we collected hearing function data including behavioral audiometric thresholds and distortion product otoacoustic emissions (DPOAEs) in 176 firefighters during annual physical assessments. Results revealed significant deficits in cochlear outer hair cell function in the presence of normal audiograms. Additionally, 55% of firefighters self-reported changes in hearing, while 20% self-reported concerns about their balance. This study is the first to characterize DPOAEs in firefighters who display decreased DPOAE amplitudes with increasing years in the fire service. These effects were observed even when controlling for hearing loss and age and are suggestive of a link between hearing loss and occupational exposure to hazardous noise.
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Affiliation(s)
- Hillary A. Snapp
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL 33136, USA or
| | - Natasha Schaefer Solle
- Department of Medicine, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Barbara Millet
- Department of Interactive Media, University of Miami, Coral Gables, FL 33146, USA
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL 33146, USA
| | - Suhrud M. Rajguru
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL 33136, USA or
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL 33146, USA
- RestorEar Devices LLC, Kirkland, WA 98033, USA
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Vetešník A, Vencovský V, Gummer AW. An additional source of distortion-product otoacoustic emissions from perturbation of nonlinear force by reflection from inhomogeneities. J Acoust Soc Am 2022; 152:1660. [PMID: 36182298 DOI: 10.1121/10.0013992] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 08/20/2022] [Indexed: 06/16/2023]
Abstract
The basilar membrane in the cochlea can be modeled as an array of fluid coupled segments driven by stapes vibration and by the undamping nonlinear force simulating cochlear amplification. If stimulated with two tones, the model generates additional tones due to nonlinear distortion. These distortion products (DPs) can be transmitted into the ear canal and produce distortion-product otoacoustic emissions (DPOAEs) known to be generated in the healthy ear of various vertebrates. This study presents a solution for DPs in a two-dimensional nonlinear cochlear model with cochlear roughness-small irregularities in the impedance along the basilar membrane, which may produce additional DPs due to coherent reflection. The solution allows for decomposition of various sources of DPs in the model. In addition to the already described nonlinear-distortion and coherent-reflection mechanisms of DP generation, this study identifies a long-latency DPOAE component due to perturbation of nonlinear force. DP wavelets that are coherently reflected due to impedance irregularities travel toward the stapes across the primary generation region of DPs and there evoke perturbation of the nonlinear undamping force. The ensuing DP wavelets have opposite phase to the wavelets arising from coherent reflection, which results in partial cancellation of the coherent-reflection DP wavelets.
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Affiliation(s)
- Aleš Vetešník
- Department of Nuclear Chemistry, Czech Technical University in Prague, Prague 115 19, Czech Republic
| | - Václav Vencovský
- Department of Radioelectronics, Czech Technical University in Prague, Prague 166 27, Czech Republic
| | - Anthony W Gummer
- Section of Physiological Acoustics and Communication, Department of Otolaryngology, Eberhard-Karls University Tübingen, Tübingen 72076, Germany
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Gür E, Binkhamis G, Kluk K. Effects of multiple sclerosis on the audio-vestibular system: a systematic review. BMJ Open 2022; 12:e060540. [PMID: 35977771 PMCID: PMC9389089 DOI: 10.1136/bmjopen-2021-060540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 06/29/2022] [Indexed: 11/29/2022] Open
Abstract
OBJECTIVE Systematically investigate the effects of multiple sclerosis (MS) on the audio-vestibular system. METHODS Systematic review of literature investigating audio-vestibular conditions in persons with MS (PwMS) aged ≥18 years. PubMed, Scopus, NICE and Web of Science were searched. Randomised controlled trials, and cohort, case-control, observational and retrospective studies in English, published from 2000 to 21 November 2021, evaluated PwMS with at least one outcome (pure tone audiometry, auditory brainstem response, otoacoustic emissions, cortical auditory evoked potentials, functional MRI assessing auditory function, vestibular evoked myogenic potentials, videonystagmography, electronystagmography, posturography, rotary chair, gaps in noise, word discrimination scores, duration pattern sequence test), were included. Study selection and assessments of bias were independently conducted by two reviewers using the Risk of Bias Assessment Tool for Non-randomized Studies, Newcastle-Ottawa Scale (NOS) and the NOS adapted for cross-sectional studies. RESULTS 35 studies were included. Auditory function was evaluated in 714 PwMS and 501 controls, vestibular function was evaluated in 682 PwMS and 446 controls. Peripheral auditory function results were contradictory between studies; some found abnormalities in PwMS, and others found no differences. Tests of brainstem and central auditory functions were more consistently found to be abnormal in PwMS. Most vestibular tests were reported as abnormal in PwMS, abnormalities were either peripheral or central or both. However, quantitative analyses could not be performed due to discrepancies between studies in results reporting, test stimulus and recording parameters. CONCLUSIONS Although abnormal results on auditory and vestibular tests were noted in PwMS, specific effects of MS on the audio-vestibular system could not be determined due to the heterogeneity between studies that restricted the ability to conduct any quantitative analyses. Further research with consistent reporting, consistent stimulus and consistent recording parameters is needed in order to quantify the effects of MS on the auditory and vestibular systems. PROSPERO REGISTRATION NUMBER CRD42020180094.
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Affiliation(s)
- Evrim Gür
- Manchester Centre for Audiology and Deafness (ManCAD), School of Health Sciences, Ellen Wilkinson Building, The University of Manchester, Manchester, UK
| | - Ghada Binkhamis
- Manchester Centre for Audiology and Deafness (ManCAD), School of Health Sciences, Ellen Wilkinson Building, The University of Manchester, Manchester, UK
- Communication and Swallowing Disorders, King Fahad Medical City, Riyadh, Saudi Arabia
| | - Karolina Kluk
- Manchester Centre for Audiology and Deafness (ManCAD), School of Health Sciences, Ellen Wilkinson Building, The University of Manchester, Manchester, UK
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Wang WL, Bai YR, Zheng Q, Zheng S, Liu XY, Ni GJ. Otoacoustic emission and its application in anesthesia. Eur Rev Med Pharmacol Sci 2022; 26:5426-5435. [PMID: 35993638 DOI: 10.26355/eurrev_202208_29411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVE An otoacoustic emission (OAE) is a low-level sound emitted by the cochlea. OAEs are able to objectively evaluate the auditory perception and reflect the functional status of the auditory system. With the characteristics of non-invasiveness, high reliability, and easy manipulation, OAEs have gained wide popularity in clinical audiology and anesthesiology. This review aims to summarize the application of OAE in anesthesia. MATERIALS AND METHODS This study collected data from the databases Web of Science-Clarivate Analytics, PubMed, and Google Scholar in English, covering research in the last 40 years. The keywords were defined as anesthesia, cochlea, OAEs, distortion product otoacoustic emissions, transient evoked otoacoustic emissions, bispectral index, auditory evoked potentials, and depth of anesthesia. Documents that matched defined keywords were selected and reviewed. RESULTS Research showed that the types and doses of anesthetic drugs impacted OAEs. Ketamine-based anesthesia has a greater effect on OAE sensitivity over time compared to isoflurane. A higher dose of ketamine-xylazine significantly reduced the amplitude of OAEs. According to those characteristics, OAEs could be used as an objective evaluation method for the effect of anesthetics and have great potential to be applied for anesthetic drug dose control during surgery. OAEs also have been used to detect the cochlear function during anesthesia, which may cause irreversible damage to the cochlea. CONCLUSIONS Studies reported that OAEs have been used in anesthesia. However, the existing studies have mainly focused on the influence of anesthetic types or dosages on OAEs. Considering the characteristics of OAEs, such as a convenient measurement, less susceptibility to interference, and fast detection speed, the application of OAE has a great potential in the anesthesia field.
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Affiliation(s)
- W-L Wang
- Department of Biomedical Engineering, College of Precision Instruments and Optoelectronics Engineering, Tianjin University, Tianjin, China.
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Tayade A, Tucker D. Evaluation of Medial Olivocochlear Neural Efferent Pathway in Tinnitus Perception in Normal-hearing Individuals. Int Tinnitus J 2022; 26:20-26. [PMID: 35861455 DOI: 10.5935/0946-5448.20220004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
OBJECTIVE The objective of this study is to investigate a possible role of the Medial Olivocochlear (MOC) efferent neural pathway and neural connections responsible for tinnitus generation in silence/sensory deprivation. DESIGN By placing normal hearing participants in a sound booth for 10 minutes, silence/sensory deprivation was created. This offered assessment of MOC neural pathway in normal hearing participants in silence. Hyperactivity of MOC neural pathway was assessed by its more suppressive effect on Transient Otoacoustic Emissions (TEOAEs) in silence. The required auditory measurements were recorded in the sound booth using recommended diagnostic protocols to ensure the effect of 'only silence' on auditory structures. TEOAE were recorded from the right ear and suppression was measured by placing noise in the left ear. Fifty-eight normal hearing male individuals between age 18-35 years were recruited as participants in this study. RESULTS Approximately, forty-one percent of the participants perceived some type of tinnitus during/after 10 minutes of silence. No statistically significant difference was found in the total TEOAE amplitude and TEOAE suppression amplitude before and after ten minutes of silence. Post silence total TEOAE suppression between tinnitus perceiving and non-perceiving tinnitus participants were not statistically significantly different. CONCLUSION These results suggest that the medial olivocochlear efferent pathway or lower brain stem area does not appear to play a role in the emergence of temporary tinnitus in silence however indicate the involvement of higher central auditory nervous system structures in perception of the tinnitus which support the well-accepted notion that tinnitus is the central auditory processing phenomenon.
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Affiliation(s)
- Amitkumar Tayade
- Department of Communication Sciences and Disorders, Edinboro University of Pennsylvania, Human Services Building Room 237, 215 Scotland Rd, Edinboro, USA
| | - Denise Tucker
- Department of Communication Sciences and Disorders, University of North Carolina Greensboro, 317 Ferguson Building, Greensboro, USA
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Akcay G, Danısman B, Basaranlar G, Guzel P, Derin N, Derin AT. The effect of increase in blood glucose level on hearing loss. Braz J Otorhinolaryngol 2022; 88 Suppl 3:S95-S102. [PMID: 35729043 DOI: 10.1016/j.bjorl.2022.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 04/04/2022] [Accepted: 06/05/2022] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE Previous studies have shown that hearing function is also vulnerable to the effects of diabetes mellitus which can be shown by brainstem auditory evoked potential and distortion product otoacoustic emission recordings. This study aimed to investigate the changes of brainstem auditory evoked potential and distortion product otoacoustic emission in hyperglycemia and whether there is a relationship between reactive oxygen substances production and hearing deterioration in the rat model. METHODS 25 streptozotocin induced diabetic rats were divided into three groups: control, high blood glucose, and diabetes mellitus. Brainstem auditory evoked potential and distortion product otoacoustic emission were recorded, and thiobarbituric acid reactive substances levels were measured in the brainstem tissue. RESULTS At 8 kHz, the latencies of I, II, III, IV, and V brainstem auditory evoked potential waves in high blood glucose and diabetes mellitus groups were elongated, at 16 kHz, only these wave latencies of the diabetes mellitus group were prolonged compared with the control group. A significant decrease was also found in distortion product otoacoustic emission amplitudes at 4, 6, 8, and 10 kHz in the high blood glucose and diabetes mellitus groups compared to the control group. There was a significant increase in thiobarbituric acid reactive substances values due to the increase in blood glucose levels in the high blood glucose and diabetes mellitus groups compared to the control group. CONCLUSION These results suggested that high blood glucose levels may cause hearing impairment not only in the diabetic state but also in the period of hyperglycemia before the onset of manifest diabetes mellitus and reactive oxygen substances may play an important role in the pathophysiology of diabetes mellitus. We suggest that regulating high glucose levels even before the onset of manifest diabetes mellitus may prevent hazardous effects on hearing function. LEVEL OF EVIDENCE Level 3.
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Affiliation(s)
- Guven Akcay
- Hitit University, Faculty of Medicine, Department of Biophysics, Çorum, Turkey
| | - Betul Danısman
- Atatürk University, Faculty of Medicine, Department of Biophysics, Erzurum, Turkey
| | - Goksun Basaranlar
- İzmir Demokrasi University, Vocational School of Health Services, İzmir, Turkey
| | - Pınar Guzel
- Kozan State Hospital, Department of Otolaryngology Head and Neck Surgery, Adana, Turkey
| | - Narin Derin
- Akdeniz University, Faculty of Medicine, Department of Biophysics, Antalya, Turkey.
| | - Alper Tunga Derin
- Akdeniz University, Faculty of Medicine, Department of Otolaryngology Head and Neck Surgery, Antalya, Turkey
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Dudarewicz A, Zamojska-Daniszewska M, Zaborowski K, Pawlaczyk-Łuszczyńska M. Hearing status of people occupationally exposed to ultrasonic noise. Int J Occup Med Environ Health 2022; 35:309-325. [PMID: 35289340 PMCID: PMC10464771 DOI: 10.13075/ijomeh.1896.01816] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 11/04/2021] [Indexed: 10/18/2022] Open
Abstract
OBJECTIVES The aim of the study was to evaluate the hearing status of operators of low-frequency ultrasonic devices compared to employees exposed to audible noise at a similar A-weighted sound pressure level (SPL) but without ultrasonic components. MATERIAL AND METHODS Standard pure-tone audiometry, extended high-frequency audiometry (EHFA), transient-evoked otoacoustic emissions (TEOAE), and distortion-product otoacoustic emissions (DPOAE), as well as questionnaire surveys were conducted among 148 subjects, aged 43.1±10.8 years, working as ultrasonic device operators for 18.7±10.6 years. Their exposure to noise within the ultrasonic and audible frequency range was also evaluated. The control group comprised 168 workers, adjusted according to gender, age (±2 years), tenure (±2 years), and the 8-hour daily noise exposure level (LEX,8h) of ±2 dB. RESULTS The ultrasonic device operators and the control group were exposed to audible noise at LEX,8h of 80.8±3.9 dB and 79.1±3.4, respectively. The Polish maximum admissible intensity (MAI) values for audible noise were exceeded in 16.8% of the ultrasonic device operators, while 91.2% of them were exposed to ultrasonic noise at SPL>MAI values. There were no significant differences between the groups in terms of the hearing threshold levels (HTLs) up to 3 kHz, while the ultrasonic device operators exhibited significantly higher (worse) HTLs, as compared to the control group, in the range of 4-14 kHz. The results of the DPOAE and TEOAE testing also indicated worse hearing among the ultrasonic device operators. However, the differences between the groups were more pronounced in the case of EHFA and DPOAEs. CONCLUSIONS The outcomes of all hearing tests consistently indicated worse hearing among the ultrasonic device operators as compared to the control group. Both EHFA and DPOAE seem to be useful tools for recognizing early signs of hearing loss among ultrasonic device operators. nt J Occup Med Environ Health. 2022;35(3):309-25.
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Affiliation(s)
- Adam Dudarewicz
- Nofer Institute of Occupational Medicine, Department of Physical Hazards, Łódź, Poland
| | | | - Kamil Zaborowski
- Nofer Institute of Occupational Medicine, Department of Physical Hazards, Łódź, Poland
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吴 文, 丁 雷, 高 铭, 黄 创, 王 冬, 姜 辉, 魏 然. [Electrophysiological study of the cochlea in patients with unilateral acute tinnitus]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2022; 36:357-361. [PMID: 35483686 PMCID: PMC10128253 DOI: 10.13201/j.issn.2096-7993.2022.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Indexed: 06/14/2023]
Abstract
Objective:To analyze the objective test results of the pure-tone audiogram (PTA), extended high-frequency audiometry (EHFA), distortion product otoacoustic emission (DPOAE), auditory brainstem response(ABR), and electrocochleogram (ECochG) in patients with unilateral acute tinnitus, summarize their characteristics and explore their clinical application value in hidden hearing loss. Methods:PTA, DPOAE, ABR, and ECochG tests were performed in 33 patients with unilateral acute tinnitus as the chief complaint. The detection rate and response amplitude of each DPOAE frequency, incubation period, and interval of ABR waves and -SP/AP in ECochG were analyzed. Results:①The thresholds of PTA at 0.25-8 kHz in both ears were in the normal range (P>0.05), and the thresholds of PTA at 9-16 kHz in affected ears were higher than those in healthy ears (P<0.001); ②There was statistical significance in the detection rate and response amplitude of DPOAE at 3, 4, 6, 8 kHz between ears (P<0.05); ③The incubation period of ABR Ⅰ wave in affected ears was (1.55±0.17) ms, that in the healthy ear was (1.50±0.14) ms, among them, the incubation period of ABR Ⅰ wave in the affected ear was longer than that in the healthy ear, and the difference was statistically significant (P<0.05); ④In ECochG, there was no significant difference in -SP amplitude between ears (P>0.05), but there was a significant difference in AP amplitude and -SP/AP amplitude between ears (P<0.05). Conclusion:EHFA, DPOAE, ABR, and ECochG have clinical significance in evaluating cochlear function in tinnitus patients.
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Affiliation(s)
- 文丽 吴
- 北京中医药大学东方医院耳鼻咽喉科(北京,100078)Department of Otolaryngology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, 100078, China
| | - 雷 丁
- 北京中医药大学东方医院耳鼻咽喉科(北京,100078)Department of Otolaryngology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, 100078, China
| | - 铭媛 高
- 北京中医药大学东方医院耳鼻咽喉科(北京,100078)Department of Otolaryngology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, 100078, China
| | - 创惠 黄
- 北京中医药大学东方医院耳鼻咽喉科(北京,100078)Department of Otolaryngology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, 100078, China
| | - 冬梅 王
- 北京中医药大学东方医院耳鼻咽喉科(北京,100078)Department of Otolaryngology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, 100078, China
| | - 辉 姜
- 北京中医药大学东方医院耳鼻咽喉科(北京,100078)Department of Otolaryngology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, 100078, China
| | - 然 魏
- 北京中医药大学东方医院耳鼻咽喉科(北京,100078)Department of Otolaryngology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, 100078, China
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Kümüş Ö, Olgun Y, Mungan Durankaya S, Aktaş S, Kirkim G, Sütay S. Oleuropein Effect on Noise-Induced Hearing Loss. J Int Adv Otol 2022; 18:118-124. [PMID: 35418359 PMCID: PMC9450182 DOI: 10.5152/iao.2022.20009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Background: To investigate the possible protective activity of oleuropein compound on noise-induced hearing loss in rats. Methods: Twenty-eight adult male albino rats were divided into 4 groups. Control normal saline (n = 7) group was kept noise-free. Control oleuropein group (n = 7) group was kept noise-free and was administered with 50 mg/kg/day oleuropein. The experimental normal saline (n = 7) group was subjected to noise. The experimental oleuropein (n = 7) group was subjected to noise and was administered with 50 mg/kg/day oleuropein. The experimental groups were subjected to 4 kHz octave noise with a frequency of 120 dB Sound Pressure Level (SPL) for 4 hours. Hearing level measurements were performed with auditory brainstem response and distortion-product otoacoustic emission tests before and after the 1st, 7th, and 10th day of the noise exposure. On the 10th day, rats were sacrificed. The temporal bones of the rats were removed and the cochlea and spiral ganglion cells were evaluated using hematoxylin–eosin staining under light microscopy. Results: Better hearing thresholds were achieved in the experimental oleuropein group compared to the experimental normal saline group at 8 kHz, 12 kHz, 16 kHz, and 32 kHz frequencies (P < .05). Although no statistically significant difference was found between the groups, in the experimental normal saline group, the percentage of damaged spiral ganglion cells was higher than the experimental oleuropein group. Conclusion: Our findings suggest that oleuropein may have a partial protective effect against noise-related hearing loss. However, further research with higher doses is needed to justify this protective effect.
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Affiliation(s)
- Özgür Kümüş
- Department of Otorhinolaryngology, Dokuz Eylul University Faculty of Medicine, İzmir, Turkey
- Corresponding author: Özgür Kümüş, e-mail: ;
| | - Yüksel Olgun
- Department of Otorhinolaryngology, Dokuz Eylul University Faculty of Medicine, İzmir, Turkey
| | - Serpil Mungan Durankaya
- Department of Otorhinolaryngology, Unit of Hearing Speech and Balance, Dokuz Eylül University Faculty of Medicine, İzmir, Turkey
| | - Safiye Aktaş
- Department of Basic Oncology, Dokuz Eylul University Institute of Oncology, İzmir, Turkey
| | - Günay Kirkim
- Department of Otorhinolaryngology, Unit of Hearing Speech and Balance, Dokuz Eylül University Faculty of Medicine, İzmir, Turkey
| | - Semih Sütay
- Department of Otorhinolaryngology, Dokuz Eylul University Faculty of Medicine, İzmir, Turkey
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Bhatt IS, Washnik N, Torkamani A. Suprathreshold Auditory Measures for Detecting Early-Stage Noise-Induced Hearing Loss in Young Adults. J Am Acad Audiol 2022; 33:185-195. [PMID: 36195294 PMCID: PMC10858682 DOI: 10.1055/s-0041-1740362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2022]
Abstract
BACKGROUND Over 1 billion young adults are at risk for developing noise-induced hearing loss (NIHL) due to their habit of listening to music at loud levels. The gold standard for detecting NIHL is the audiometric notch around 3,000 to 6,000 Hz observed in pure tone audiogram. However, recent studies suggested that suprathreshold auditory measures might be more sensitive to detect early-stage NIHL in young adults. PURPOSE The present study compared suprathreshold measures in individuals with high and low noise exposure backgrounds (NEBs). We hypothesized that individuals with high NEB would exhibit reduced performance on suprathreshold measures than those with low NEB. STUDY SAMPLE An initial sample of 100 English-speaking healthy adults (18-35 years; females = 70) was obtained from five university classes. We identified 15 participants with the lowest NEB scores (10 females) and 15 participants with the highest NEB scores (10 females). We selected a sample of healthy young adults with no history of middle ear infection, and those in the low NEB group were selected with no history of impulse noise exposure. DATA COLLECTION AND ANALYSIS The study included conventional audiometry, extended high-frequency audiometry, middle ear muscle reflex (MEMR) thresholds, distortion-product otoacoustic emissions (DPOAEs), QuickSIN, and suprathreshold auditory brainstem response (ABR) measures. We used independent sample t-tests, correlation coefficients, and linear mixed model analysis to compare the audiometric measures between the NEB groups. RESULTS The prevalence of audiometric notch was low in the study sample, even for individuals with high NEB. We found that: (1) individuals with high NEB revealed significantly reduced QuickSIN performance than those with low NEB; (2) music exposure via earphone revealed a significant association with QuickSIN; (3) individuals with high NEB revealed significantly reduced DPOAEs and ABR wave I amplitude compared with individuals with low NEB; (4) MEMR and ABR latency measures showed a modest association with NEB; and (5) audiometric thresholds across the frequency range did not show statistically significant association with NEB. CONCLUSION Our results suggest that young adults with high NEB might exhibit impaired peripheral neural coding deficits leading to reduced speech-in-noise (SIN) performance despite clinically normal hearing thresholds. SIN measures might be more sensitive than audiometric notch for detecting early-stage NIHL in young adults.
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Affiliation(s)
- Ishan S Bhatt
- Department of Communication Sciences and Disorders, The University of Iowa, Iowa City, Iowa
| | - Nilesh Washnik
- Department of Communication Sciences & Disorders, Ohio University, Athens, Ohio
| | - Ali Torkamani
- Department of Integrative Structural and Computational Biology, Scripps Translational Science Institute, La Jolla, California
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Koca CF, Celik T, Simsek A, Aydin S, Kelles M, Yasar S, Erdur O. Does SARS-CoV-2 affect cochlear functions in children? Saudi Med J 2022; 43:259-265. [PMID: 35256493 PMCID: PMC9280535 DOI: 10.15537/smj.2022.43.3.20210782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 12/26/2021] [Indexed: 11/25/2022] Open
Abstract
Objectives: To determine the influence of coronavirus disease-19 (COVID-19) on cochlear tasks of children who had COVID-19 previously, and the relevance among disease seriousness and cochlear involvement by otoacoustic emissions (OAEs). Methods: The study included 24 hospitalized children after COVID-19 diagnosis, 23 pediatrics that received outpatient treatment, and 21 children who were without COVID-19 diagnosis as the control group between June 2021 and July 2021. Transient evoked otoacoustic emission (TEOAE), distortion product otoacoustic emission, and contrlateral suppression of otoacoustic emission measurements were carried out for each child. Symptoms of patients, the treatments they received, and the duration of hospitalization of the children in the hospitalized group were recorded. Results: The comparison of TEOAE test results under masking showed a considerable difference between 3 groups at 1 kHz (p=0.033) and 4 kHz (p=0.021) frequencies (p<0.05). Distortion product otoacoustic emission test results of hospitalized outpatient and control group showed a statistically significant difference at 2 kHz among themselves (p=0.009). Conclusion: Our results suggest that severe acute respiratory syndrome coronavirus-2 may influence the medial olivocochlear system of children and have irreversible effects on the cochlear functions. Early detection of problems that may affect cochlear functions is a special critical task, especially in children, who are a particularly vulnerable group in terms of hearing and related speech problems.
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Affiliation(s)
- Cigdem F. Koca
- From the Department of Otolaryngology Head and Neck Surgery (Koca, Kelles), Faculty of Medicine, Turgut Özal University, from the Department of Otolaryngology Head and Neck Surgery (Celik, Aydin), Malatya Training and Research Hospital, from the Department of Audiology (Simsek), Faculty of Health Sciences; from the Department of Biostatistics and Medical Informatics (Yasar), Faculty of Medicine, Inonu University, Malatya, and from the Department of Otorhinolaryngology (Erdur), Faculty of Medicine, Selcuk University, Konya, Turkey.
- Address correspondence and reprint request to: Dr. Cigdem F. Koca, Department of Otolaryngology Head and Neck Surgery, Faculty of Medicine, Turgut Özal University, Malatya, Turkey. E-mail: ORCID ID: https://orcid.org/0000-0001-8990-0651
| | - Turgut Celik
- From the Department of Otolaryngology Head and Neck Surgery (Koca, Kelles), Faculty of Medicine, Turgut Özal University, from the Department of Otolaryngology Head and Neck Surgery (Celik, Aydin), Malatya Training and Research Hospital, from the Department of Audiology (Simsek), Faculty of Health Sciences; from the Department of Biostatistics and Medical Informatics (Yasar), Faculty of Medicine, Inonu University, Malatya, and from the Department of Otorhinolaryngology (Erdur), Faculty of Medicine, Selcuk University, Konya, Turkey.
| | - Agit Simsek
- From the Department of Otolaryngology Head and Neck Surgery (Koca, Kelles), Faculty of Medicine, Turgut Özal University, from the Department of Otolaryngology Head and Neck Surgery (Celik, Aydin), Malatya Training and Research Hospital, from the Department of Audiology (Simsek), Faculty of Health Sciences; from the Department of Biostatistics and Medical Informatics (Yasar), Faculty of Medicine, Inonu University, Malatya, and from the Department of Otorhinolaryngology (Erdur), Faculty of Medicine, Selcuk University, Konya, Turkey.
| | - Sukru Aydin
- From the Department of Otolaryngology Head and Neck Surgery (Koca, Kelles), Faculty of Medicine, Turgut Özal University, from the Department of Otolaryngology Head and Neck Surgery (Celik, Aydin), Malatya Training and Research Hospital, from the Department of Audiology (Simsek), Faculty of Health Sciences; from the Department of Biostatistics and Medical Informatics (Yasar), Faculty of Medicine, Inonu University, Malatya, and from the Department of Otorhinolaryngology (Erdur), Faculty of Medicine, Selcuk University, Konya, Turkey.
| | - Mehmet Kelles
- From the Department of Otolaryngology Head and Neck Surgery (Koca, Kelles), Faculty of Medicine, Turgut Özal University, from the Department of Otolaryngology Head and Neck Surgery (Celik, Aydin), Malatya Training and Research Hospital, from the Department of Audiology (Simsek), Faculty of Health Sciences; from the Department of Biostatistics and Medical Informatics (Yasar), Faculty of Medicine, Inonu University, Malatya, and from the Department of Otorhinolaryngology (Erdur), Faculty of Medicine, Selcuk University, Konya, Turkey.
| | - Seyma Yasar
- From the Department of Otolaryngology Head and Neck Surgery (Koca, Kelles), Faculty of Medicine, Turgut Özal University, from the Department of Otolaryngology Head and Neck Surgery (Celik, Aydin), Malatya Training and Research Hospital, from the Department of Audiology (Simsek), Faculty of Health Sciences; from the Department of Biostatistics and Medical Informatics (Yasar), Faculty of Medicine, Inonu University, Malatya, and from the Department of Otorhinolaryngology (Erdur), Faculty of Medicine, Selcuk University, Konya, Turkey.
| | - Omer Erdur
- From the Department of Otolaryngology Head and Neck Surgery (Koca, Kelles), Faculty of Medicine, Turgut Özal University, from the Department of Otolaryngology Head and Neck Surgery (Celik, Aydin), Malatya Training and Research Hospital, from the Department of Audiology (Simsek), Faculty of Health Sciences; from the Department of Biostatistics and Medical Informatics (Yasar), Faculty of Medicine, Inonu University, Malatya, and from the Department of Otorhinolaryngology (Erdur), Faculty of Medicine, Selcuk University, Konya, Turkey.
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Abstract
PURPOSE Human studies of noise-induced cochlear synaptopathy using physiological indicators identified in animal models (auditory brainstem response [ABR] Wave I amplitude, envelope following response [EFR], and middle ear muscle reflex [MEMR]) have yielded mixed findings. Differences in the population studied may have contributed to the differing results. For example, due to differences in the intensity level of the noise exposure, noise-induced synaptopathy may be easier to detect in a military Veteran population than in populations with recreational noise exposure. We previously demonstrated a reduction in ABR Wave I amplitude and EFR magnitude for young Veterans with normal audiograms reporting high levels of noise exposure compared to non-Veteran controls. In this article, we expand on the previous analysis in the same population to determine if MEMR magnitude is similarly reduced. METHOD Contralateral MEMR growth functions were obtained in 92 young Veterans and non-Veterans with normal audiograms, and the relationship between noise exposure history and MEMR magnitude was assessed. Associations between MEMR magnitude and distortion product otoacoustic emission, EFR, and ABR measurements collected in the same sample were also evaluated. RESULTS The results of the statistical analysis, although not conventionally statistically significant, suggest a reduction in mean MEMR magnitude for Veterans reporting high noise exposure compared with non-Veteran controls. In addition, the MEMR appears relatively insensitive to subclinical outer hair cell dysfunction, as measured by distortion product otoacoustic emissions, and is not well correlated with ABR and EFR measurements. CONCLUSIONS When combined with our previous ABR and EFR findings in the same population, these results suggest that noise-induced synaptopathy occurs in humans. In addition, the findings indicate that the MEMR may be a good candidate for noninvasive diagnosis of cochlear synaptopathy/deafferentation and that the MEMR may reflect the integrity of different neural populations than the ABR and EFR. SUPPLEMENTAL MATERIAL https://doi.org/10.23641/asha.18665645.
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Affiliation(s)
- Naomi F Bramhall
- VA RR&D National Center for Rehabilitative Auditory Research, VA Portland Health Care System, OR
- Department of Otolaryngology - Head & Neck Surgery, Oregon Health & Science University, Portland
| | - Kelly M Reavis
- VA RR&D National Center for Rehabilitative Auditory Research, VA Portland Health Care System, OR
| | - M Patrick Feeney
- VA RR&D National Center for Rehabilitative Auditory Research, VA Portland Health Care System, OR
- Department of Otolaryngology - Head & Neck Surgery, Oregon Health & Science University, Portland
| | - Sean D Kampel
- VA RR&D National Center for Rehabilitative Auditory Research, VA Portland Health Care System, OR
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Yıldız E. Comparison of pure tone audiometry thresholds and transient evoked otoacoustic emissions (TEOAE) of patients with and without Covid-19 pneumonia. Am J Otolaryngol 2022; 43:103377. [PMID: 35121526 PMCID: PMC8800161 DOI: 10.1016/j.amjoto.2022.103377] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 01/24/2022] [Indexed: 12/23/2022]
Abstract
Objective COVID-19 is an infectious disease caused by the new coronavirus that starts similar to an upper respiratory tract infection and causes death by causing pneumonia and vasculopathy. Many viral infections are known to cause hearing loss. In this study, pure-tone audiometry (PTA) thresholds and Transient Evoked Otoacoustic Emissions (TEOAE) results were compared across patients with COVID-19 disease and COVID-19 pneumonia, and control group patients. Methods The study included 240 patients in the age range of 18–50 years. The patients were divided into three groups of 80 patients as the control (no disease), COVID-19 (nonpneumonia), Covid-19 (pneumonia) groups. PTA and TEOAE tests were performed on the control group patients and the results were recorded. PTA and TEOAE tests were performed in the COVID-19 groups in the first and third months after the infection ended. Each test was performed twice; the results were recorded, and the mean of the two results was calculated. Results PTA results and TEOAE amplitudes in the first and third months were not significantly different between the COVID-19 non-pneumonia group and the control group (p > 0.05), between the COVID-19 pneumonia group and the control group (p > 0.05), and between the COVID-19 non-pneumonia group and the COVID-19 pneumonia group (p > 0.05). Conclusions Despite minimal impairment and minimal amplitude decreases in patients, who recovered from COVID-19, such changes were found to become restored in the third month. Furthermore, no significant changes were observed to indicate COVID-19- associated hearing loss.
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Affiliation(s)
- Erkan Yıldız
- Department of Otolaryngology, Afyonkarahisar Şuhut State Hospital, Afyonkarahisar, Turkey.
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