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Titolo:
REMOTE MASKING IN NORMAL-HEARING AND NOISE-EXPOSED CHINCHILLAS
Autore:
MCFADDEN SL; HENDERSON D; QUARANTA A;
Indirizzi:
SUNY BUFFALO,HEARING RES LABS,DEPT COMMUN SCI & DISORDERS,215 PARKER HALL BUFFALO NY 14214 UNIV BARI,DEPT AUDIOL & OTOL BARI ITALY
Titolo Testata:
Audiology & neuro-otology
fascicolo: 3, volume: 2, anno: 1997,
pagine: 128 - 138
SICI:
1420-3030(1997)2:3<128:RMINAN>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRODUCT OTOACOUSTIC EMISSIONS; AUDIBILITY CURVE; FREQUENCY; EXPOSURES;
Keywords:
TEMPORARY THRESHOLD SHIFT; NOISE-INDUCED HEARING LOSS; ACOUSTIC TRAUMA; AUDITORY MASKING; COCHLEAR DISTORTION; AUDITORY NONLINEARITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
40
Recensione:
Indirizzi per estratti:
Citazione:
S.L. Mcfadden et al., "REMOTE MASKING IN NORMAL-HEARING AND NOISE-EXPOSED CHINCHILLAS", Audiology & neuro-otology, 2(3), 1997, pp. 128-138

Abstract

Remote masking (RM), the phenomenon whereby an intense high-frequencymasking noise elevates thresholds for low-frequency signals, has beenshown to be sensitive to various types of hearing loss in humans. We performed two experiments to evaluate the chinchilla as a model of RM and to examine changes in RM associated with temporary threshold shifts (TTSs) induced by low-frequency noise exposure. Thresholds for 0.5-,1- and 2-kHz tones were measured in quiet, then in the presence of a narrow-band (300-Hz-wide) masking noise centered at 3 kHz. In Experiment I, effective masking was measured as a function of masker level, from 48 to 98 dB sound pressure level (SPL; referenced to 20 mu Pa), to determine threshold and rate of growth of RM in the chinchilla. In Experiment II, RM was measured before, during and after exposure to a low-frequency noise known to produce TTSs in chinchillas (i.e., a 0.5-kHzoctave band noise at 90 dB SPL for 6 h/day for 10 days). The results show that normal-hearing chinchillas have the same pattern of RM as humans, and that a noise exposure that produces TTSs also produces rapidand significant changes in RM.

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Documento generato il 05/12/20 alle ore 01:23:21