Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Psychophysical suppression effects for tonal and speech signals
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: 4, volume: 110, anno: 2001,
pagine: 2108 - 2119
SICI:
0001-4966(200110)110:4<2108:PSEFTA>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
NORMAL-HEARING LISTENERS; AUDITORY-NERVE FIBERS; FREQUENCY-SELECTIVITY; SIMULTANEOUS-MASKING; CONSONANT RECOGNITION; VOWEL IDENTIFICATION; 2-TONE SUPPRESSION; STOP CONSONANTS; PATTERNS; ENHANCEMENT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Engineering, Computing & Technology
Citazioni:
40
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 effects for tonal and speech signals", J ACOUST SO, 110(4), 2001, pp. 2108-2119

Abstract

This experiment assessed the benefits of suppression and the impact of reduced or absent suppression on speech recognition in noise. Psychophysical suppression was measured in forward masking using tonal maskers and suppressors and band limited noise maskers and suppressors. Subjects were 10 younger and 10 older adults with normal hearing, and 10 older adults with cochlear hearing loss. For younger subjects with normal hearing, suppression measured with noise maskers increased with masker level and was larger at 2.0 kHz than at 0.8 kHz. Less suppression was observed for older than younger subjects with normal hearing. There was little evidence of suppression for older subjects with cochlear hearing loss. Suppression measured with noise maskers and suppressors was larger in magnitude and more prevalent than suppression measured with tonal maskers and suppressors. The benefit of suppression to speech recognition in noise was assessed by obtaining scores for filtered consonant-vowel syllables as a function of the bandwidth of a forward masker. Speech-recognition scores in forward maskers should be higher than those in simultaneous maskers given that forward maskers are less effectivethan simultaneous maskers. If suppression also mitigated the effects of the forward masker and resulted in an improved signal-to-noise ratio, scores should decrease less in forward masking as forward-masker bandwidth increased, and differences between scores in forward and simultaneous maskers should increase, as was observed for younger subjects with normal hearing. Lessor no benefit of suppression to speech recognition in noise was observed for older subjects with normal hearing or hearing loss. In general, as suppression measured with tonal signals increased, the combined benefit of forward masking and suppression to speech recognition in noise also increased. (C) 2001 Acoustical Society of America.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 14:04:22