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Titolo:
Psychophysical suppression measured with bandlimited noise extended below and/or above the signal: Effects of age and hearing loss
Autore:
Dubno, JR; Ahlstrom, JB;
Indirizzi:
Med Univ S Carolina, Dept Otolaryngol Head & Neck Surg, Charleston, SC 29425 USA Med Univ S Carolina Charleston SC USA 29425 urg, Charleston, SC 29425 USA
Titolo Testata:
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
fascicolo: 2, volume: 110, anno: 2001,
pagine: 1058 - 1066
SICI:
0001-4966(200108)110:2<1058:PSMWBN>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
AUDITORY-NERVE FIBERS; 2-TONE RATE SUPPRESSION; NARROW-BAND NOISE; TUNING CURVES; FREQUENCY-SELECTIVITY; SIMULTANEOUS MASKING; HAIR CELL; LOW-SIDE; MASKERS; RESPONSES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Engineering, Computing & Technology
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Dubno, JR Med Univ S Carolina, Dept Otolaryngol Head & Neck Surg, 39 SabinSt,POB 250150, Charleston, SC 29425 USA Med Univ S Carolina 39 Sabin St,POB 250150 Charleston SC USA 29425
Citazione:
J.R. Dubno e J.B. Ahlstrom, "Psychophysical suppression measured with bandlimited noise extended below and/or above the signal: Effects of age and hearing loss", J ACOUST SO, 110(2), 2001, pp. 1058-1066

Abstract

The objectives of this study were to measure suppression with bandlimited noise extended below and above the signal, at lower and higher signal frequencies, between younger and older subjects, and between subjects with normal hearing and cochlear hearing loss. Psychophysical suppression was assessed by measuring forward-masked thresholds at 0.8 and 2.0 kHz in bandlimited maskers as a function of masker bandwidth. Bandpass-masker bandwidth was increased by introducing noise components below and above the signal frequency while keeping the noise centered oil the signal frequency, and also by adding noise below the signal only, and above the signal only. Subjects were younger and older adults with normal hearing and older adults with cochlearhearing loss. For all subjects, suppression was larger when noise was added below the signal than when noise was added above the signal, consistent with some physiological evidence of stronger suppression below a fiber's characteristic frequency than above. For subjects with normal hearing, suppression was greater at higher than at lower frequencies. For older subjects with hearing loss, suppression was reduced to a greater extent above the signal than below and where thresholds were elevated. Suppression for older subjects with normal hearing was poorer than would be predicted from their absolute thresholds, suggesting that age may have contributed to reduced suppression or that suppression was sensitive to changes in cochlear function that did not result in significant threshold elevation. (C) 2001 Acoustical Society of America.

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Documento generato il 05/12/20 alle ore 01:39:25