Development of resistance to hearing loss from high frequency noise.
The effect of interrupted exposure on the development of progressive resistance to hearing loss from exposure to high frequency noise was studied using monaural chinchillas. The animals were exposed to an octave band noise centered at 4 kHz at 85 dB SPL for 6 h a day for ten consecutive days. Hearing thresholds were measured using evoked potential recording before and after each exposure. Results indicated a reduction in threshold shift with repeated exposures. This reduction in threshold shift or 'toughening' was more rapid for the high frequency exposures than the 'toughening' from similar low frequency exposures.
Subramaniam
M
M
Department of Communicative Disorders and Sciences, State University of New York, Buffalo 14214.
Campo
P
P
Henderson
D
D
D000161:Acoustic Stimulation; D000818:Animals; D001309:Auditory Threshold; D002682:Chinchilla; D005072:Evoked Potentials, Auditory; D006316:Hearing Loss, High-Frequency / Q000209:etiology / Q000503:physiopathology / Q000517:prevention & control*; D006317:Hearing Loss, Noise-Induced / Q000209:etiology / Q000503:physiopathology / Q000517:prevention & control*; D009622:Noise / Q000009:adverse effects