Temporary Threshold Shift as an Index of Noise Susceptibility

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Abstract
Temporary threshold shift after auditory fatigue was measured in 178 subjects with normal hearing prior to their placement in an environment of high-level noise. In addition, two audiograms were made: one prior to the noise exposure period, the second 8 weeks after its termination. Results indicated that ears showing hearing losses at 3000 and 4000 cps 8 weeks after the noise exposure tended to show longer recovery times on the pre-noise exposure fatigue test than ears with no change.

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