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Titolo:
Changes in distortion product otoacoustic emissions during prolonged noiseexposure
Autore:
Eddins, AC; Zuskov, M; Salvi, RJ;
Indirizzi:
Indiana Univ, Dept Speech & Hearing Sci, Auditory Physiol Lab, Bloomington, Indiana Univ Bloomington IN USA 47405 Auditory Physiol Lab, Bloomington, SUNY60uffalo, Dept Commun Disorders & Sci, Hearing Res Lab, Buffalo, NY 142 SUNY Buffalo Buffalo NY USA 14260 & Sci, Hearing Res Lab, Buffalo, NY 142
Titolo Testata:
HEARING RESEARCH
fascicolo: 1-2, volume: 127, anno: 1999,
pagine: 119 - 128
SICI:
0378-5955(199901)127:1-2<119:CIDPOE>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
TEMPORARY THRESHOLD SHIFTS; HAIR CELL LOSS; HIGH-FREQUENCY NOISE; 2 DISCRETE SOURCES; HEARING-LOSS; CHINCHILLA; HUMANS; INNER; VULNERABILITY; REDUCTION;
Keywords:
distortion product; otoacoustic emission; noise-induced hearing loss; chinchilla;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Eddins, AC Indiana Univ, Dept Speech & Hearing Sci, Auditory Physiol Lab, Bloomington, Indiana Univ Bloomington IN USA 47405 hysiol Lab, Bloomington,
Citazione:
A.C. Eddins et al., "Changes in distortion product otoacoustic emissions during prolonged noiseexposure", HEARING RES, 127(1-2), 1999, pp. 119-128

Abstract

The aim of this study was to evaluate the reduction in 2f(1)-f(2) distortion product otoacoustic emission (DPOAE) amplitude resulting from prolonged noise exposures. A group of five chinchillas was exposed continuously to anoctave-band noise centered at 4.0 kHz for a total of 42 days, 6 days at each of seven exposure levels. Exposure level increased in 8-dB steps from 48to 96 dB SPL. DPOAE input-output (I/O) functions were measured at octave intervals over a range of primary tone fi frequencies between 1.2 and 9.6 kHz. Measurements were obtained (1) pre-exposure, (2) during days 3-6 of each6-day exposure, and (3) 3 weeks after the final exposure. Continuous noiseexposure caused a reduction in DPOAE amplitude that was greatest at f(2) frequencies within and above (3.4-6.8 kHz) the octave-band noise exposure. For these f(2) frequencies, DPOAE amplitudes decreased as exposure level increased up to approximately 72-80 dB SPL; higher exposure levels failed to cause any further reduction in DPOAE amplitude. The noise level at which DPOAE amplitude began to decrease was approximately 50 dB SPL. Above this critical level, DPOAE amplitude decreased 1.3 dB for every dB increase in noiselevel up to approximately 75 dB SPL. (C) 1999 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 16:31:09