A behavioral measure of the cochlear changes underlying temporary threshold shifts

Howgate, Stella and Plack, Christopher J. (2011) A behavioral measure of the cochlear changes underlying temporary threshold shifts. Hearing Research, 277 (1-2). pp. 78-87. ISSN 0378-5955

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Abstract

It is well documented that exposure to recreational noise may result in a temporary threshold shift (TTS) due to cochlear dysfunction. A forward-masking paradigm was used to estimate the relative contribution of inner hair cell (IHC) and outer hair cell (OHC) dysfunction to ITS. Eighteen normal-hearing adults completed a test battery before, immediately after, and one week after attending a loud music venue. Personal dosimeters recorded mean equivalent exposure levels of 99.0 dB A. Shortly after exposure, there was an average TTS of 10.8 dB at 4 kHz, and an average reduction in the estimated gain provided by the OHCs of 11.5 dB. Gain reduction correlated significantly with ITS. The results suggest that OHC dysfunction can account almost entirely for the raised thresholds. For the test battery conducted a week after exposure, all measures showed recovery to pre-exposure values.

Item Type:
Journal Article
Journal or Publication Title:
Hearing Research
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2800/2809
Subjects:
ID Code:
66122
Deposited By:
Deposited On:
20 Aug 2013 10:26
Refereed?:
Yes
Published?:
Published
Last Modified:
11 Feb 2020 08:14