| Autor: |
Norton, Susan J., Champlin, Craig A., Mott, John B. |
| Zdroj: |
Journal of the Acoustical Society of America; 1986, Vol. 79 Issue S1, pS5-S5, 1p |
| Abstrakt: |
The effects of intense sound exposure on spontaneous otoacoustic emissions (SOAE) were measured in normally hearing human subjects as a function of exposure duration and frequency region. Consistent with the TTS literature, exposures one-half to one-quarter oct below the SOAE frequency have the largest effect. A 30-s, 105-dB SPL exposure shifts the SOAE frequency downward, while having little effect on SOAE amplitude. Recovery is biphasic: In the first minute post-exposure, the SOAE frequency changes rapidly; over the next 20 to 30 min, the SOAE slowly returns to pre-exposure values. Exposures of 15 and 60 s have similar effects. These results suggest that alterations in cochlear mechanics can be produced by stimuli that do not typically produce TTS. [Work supported by NINCDS grants R15 NS23202-01 (SJN & CAC) and T-32-NS07257 (JBM).] [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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