Abstract
This study examined individual differences among various psychophysical measures that have been suggested previously as predictors of susceptibility to noise-induced temporary threshold shift (TTS). The test battery was administered to a group of five normal-hearing young adults and consisted of the following procedures: (1) critical intensity (CI) at 2 kHz; (2) loudness discomfort level (LDL) at 0.5, 1, 2 and 4 kHz; (3) aural overload thresholds at 0.5, 1 and 2 kHz. Three measures of TTS, one employing a broad-band noise as the exposure stimulus and two others using tonal fatiguers, were utilized to assess susceptibility to TTS. Results revealed that the test battery delineated tough from tender ears. Furthermore, the aural overload test was found to be a highly accurate predictor of TTS.
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