The Effect of Short-Term Noise Exposure on Audiometric Thresholds, Distortion Product Otoacoustic Emissions, and Electrocochleography

Author:

Lake Alyson Butler1,Stuart Andrew1

Affiliation:

1. Department of Communication Sciences & Disorders, East Carolina University, Greenville, NC

Abstract

Purpose The purpose of the study was to examine the effect of short-term noise exposure on audiometric thresholds, distortion product otoacoustic emissions (DPOAEs), and electrocochleography (ECochG) as a function of ear and sex. Method Preexposure and postexposure measures of audiometric thresholds, DPOAEs, and ECochG indices were examined. Sixteen male and 16 female adults participated. Participants were exposed to a 2000-Hz narrowband noise presented at 105 dBA for 10 min. Results Following noise exposure, significantly ( p < .0001) larger auditory threshold differences were observed for left ears. Larger auditory threshold differences were also observed for 3000 and 4000 Hz versus 2000 and 6000 Hz. DPOAE absolute amplitude differences increased with decreasing L 1 , L 2 level ( p < .0001). DPOAE absolute amplitude differences also significantly rose with increasing f 2 frequencies ( p < .0001). Females generally had larger DPOAE absolute amplitude differences than males ( p < .05). Summating potential amplitudes were significantly larger for female left ears following noise exposure ( p = .03). Left-ear summating potential/action potential amplitude ratios and summating potential/action potential area ratios were increased following noise exposure ( p < .05). Conclusions Utilizing a test battery to examine the effects of short-term noise exposure can reveal the functional status of different structures in the cochlea. There appears to be a susceptibility of the left ear to short-term loud noise exposure. Findings with respect to a sex susceptibility to short-term loud noise exposure were not strong, as sex differences were only observed for a subset of the conditions.

Publisher

American Speech Language Hearing Association

Subject

Speech and Hearing,Linguistics and Language,Language and Linguistics

Reference83 articles.

1. Evoked otoacoustic emissions in workers exposed to noise: A review;Alcarás P. A.;International Archives of Otorhinolaryngology,2012

2. American Speech-Language-Hearing Association. (2005). Guidelines for manual pure-tone threshold audiometry [Guidelines] . Retrieved from http://www.asha.org/policy

3. Hearing in classical musicians;Axelsson A.;Acta Oto-Laryngologica Supplement,1981

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