| Autor: |
Mason, C. R., Kidd, G., Feth, L. L., Corban, M. A., Binnie, C. A., Carney, A. E., Cooper, W. A. |
| Zdroj: |
Journal of the Acoustical Society of America; 1981, Vol. 69 Issue S1, pS65-S65, 1p |
| Abstrakt: |
Psychophysical tuning curves (PTCs) were obtained from listeners exhibiting moderate-to-severe sensori-neural hearing impairments. These PTCs were measured in a forward masking paradigm with a 300-ms masker followed by a 20-ms probe tone at 10 dB SL with a delay of 10 ms. As expected, for these hearing-impaired subjects the PTCs were broader than comparable measures (equal sensation levels) in normal-hearing listeners. For one subject the PTC was essentially flat and fell below the probe presentation level. Given the intensity levels necessary to attempt these measurements and the possibility that these listeners exhibited recruitment (abnormal growth of loudness), it was thought that reducing the masker duration to 35 ms would reduce the loudness sufficiently to permit the determination of frequency selectivity. PTCs for brief maskers were also obtained for a group of normal-hearing listeners. Comparisons will be made between normal and hearing-impaired listeners for both long and short duration maskers. In addition, estimates of temporal integration in these two groups will be presented. Discussion will center on the summation of energy in forward masking. [Supported by a contract and grants from NINCDS.] [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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