Influence of tinnitus, lifetime noise exposure, and firearm use on hearing thresholds, distortion product otoacoustic emissions, and their relative metric

Ishan Sunilkumar Bhatt; Jeffery Lichtenhan; Richard Tyler; Shawn Goodman

doi:10.1121/10.0019880

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Influence of tinnitus, lifetime noise exposure, and firearm use on hearing thresholds, distortion product otoacoustic emissions, and their relative metric

Journal article

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Influence of tinnitus, lifetime noise exposure, and firearm use on hearing thresholds, distortion product otoacoustic emissions, and their relative metric

Ishan Sunilkumar Bhatt, Jeffery Lichtenhan, Richard Tyler and Shawn Goodman

The Journal of the Acoustical Society of America, Vol.154(1), pp.418-432

07/2023

DOI: 10.1121/10.0019880

PMCID: PMC10362977

PMID: 37477366

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https://pmc.ncbi.nlm.nih.gov/articles/PMC10362977/pdf/JASMAN-000154-000418_1.pdfView

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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.

Details

Title: Subtitle: Influence of tinnitus, lifetime noise exposure, and firearm use on hearing thresholds, distortion product otoacoustic emissions, and their relative metric
Creators: Ishan Sunilkumar Bhatt - Department of Communication Sciences & Disorders, University of Iowa
Jeffery Lichtenhan - Department of Otolaryngology–Head and Neck Surgery, University of South Florida
Richard Tyler - University of Iowa
Shawn Goodman - University of Iowa
Resource Type: Journal article
Publication Details: The Journal of the Acoustical Society of America, Vol.154(1), pp.418-432
DOI: 10.1121/10.0019880
PMID: 37477366
PMCID: PMC10362977
NLM abbreviation: J Acoust Soc Am
ISSN: 0001-4966
eISSN: 1520-8524
Number of pages: 15
Grant note: R21DC016704-01A1 / National Institute on Deafness and Other Communication Disorders (10.13039/100000055)
Date published: 07/2023
Academic Unit: Communication Sciences and Disorders; Otolaryngology; University College Courses
Record Identifier: 9984445525502771

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