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Evaluation of cochlear activity in normal-hearing musicians.
Nilesh J Washnik1, Ishan Sunilkumar Bhatt2, Susan L Phillips3
1Department of Communication Sciences & Disorders, Ohio University, United States.
Hearing Research
|July 14, 2020
Summary
Musicians and non-musicians with normal hearing showed no significant differences in auditory brainstem responses (ABRs) wave I amplitude. Noise exposure background was negatively associated with ABR wave I amplitude, suggesting potential cochlear changes.
Area of Science:
- Audiology
- Neuroscience
- Otoacoustic Emissions
Background:
- Auditory brainstem responses (ABRs) wave I amplitude can indicate cochlear synaptopathy.
- Musicians may experience higher noise exposure, potentially affecting auditory function.
- Normal audiograms do not exclude subclinical auditory pathway damage.
Purpose of the Study:
- To compare auditory brainstem responses (ABRs) wave I amplitude between musicians and non-musicians with normal hearing.
- To investigate the relationship between noise exposure background (NEB) and ABR wave I amplitude in college students.
- To explore potential indicators of cochlear synaptopathy in different student groups.
Main Methods:
- Recruited 75 college students with normal hearing, divided into non-music, brass, and voice major groups.
- Recorded two-channel ABRs using click stimuli at 90, 75, and 60 dBnHL.
- Analyzed ABR wave I amplitude using a mixed model, considering group, electrodes, and stimulus levels, and assessed NEB via questionnaire.
Main Results:
- Noise exposure background (NEB) showed a weak negative association with action potential (AP) and ABR wave I amplitude at 75 dBnHL.
- No significant differences in mean ABR wave I amplitude were found between the non-music, brass, and voice major groups.
- The observed association between NEB and ABR amplitude could not solely confirm cochlear synaptopathy, as hair cell damage remains a possibility.
Conclusions:
- The study found no significant difference in ABR wave I amplitude between musicians and non-musicians, despite varying noise exposure backgrounds.
- The negative association between NEB and ABR wave I amplitude warrants further investigation, considering potential hair cell damage.
- Future research should examine the impact of reduced cochlear output on supra-threshold speech processing in student musicians.
Keywords:
AmplitudeAuditory brainstem response (ABR)Brass majorsHearing thresholdsNoise exposureNon-musiciansSynaptopathyVoice majorsMore Related Videos
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