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Titolo:
The effect of basilar-membrane nonlinearity on the shapes of masking period patterns in normal and impaired hearing
Autore:
Wojtczak, M; Schroder, AC; Kong, YY; Nelson, DA;
Indirizzi:
Univ Minnesota, Clin Psychoacoust Lab, Minneapolis, MN 55455 USA Univ Minnesota Minneapolis MN USA 55455 st Lab, Minneapolis, MN 55455 USA
Titolo Testata:
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
fascicolo: 4, volume: 109, anno: 2001,
pagine: 1571 - 1586
SICI:
0001-4966(200104)109:4<1571:TEOBNO>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
RATE-INTENSITY FUNCTIONS; AUDITORY-NERVE FIBERS; FREQUENCY-SELECTIVITY; TEMPORAL RESOLUTION; MOSSBAUER TECHNIQUE; CHINCHILLA COCHLEA; 2-TONE INHIBITION; RESPONSE GROWTH; TUNING CURVES; MASKER LEVEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Engineering, Computing & Technology
Citazioni:
70
Recensione:
Indirizzi per estratti:
Indirizzo: Wojtczak, M Univ Minnesota, Clin Psychoacoust Lab, 420 Delaware St SE, Minneapolis, MN55455 USA Univ Minnesota 420 Delaware St SE Minneapolis MN USA 55455 USA
Citazione:
M. Wojtczak et al., "The effect of basilar-membrane nonlinearity on the shapes of masking period patterns in normal and impaired hearing", J ACOUST SO, 109(4), 2001, pp. 1571-1586

Abstract

Masking period patterns (MPPs) were measured in listeners with normal and impaired hearing using amplitude-modulated tonal maskers and short tonal probes. The frequency of the masker was either the same as the frequency of the probe ton-frequency masking) or was one octave below the frequency of the probe toff-frequency masking). In experiment 1, MPPs were measured for listeners with normal hearing using different masker levels. Carrier frequencies of 3 and 6 kHz were used for the masker. The probe had a frequency of 6kHz. For all masker levels, the off-frequency MPPs exhibited;deeper and longer valleys compared with the on-frequency MPPs. Hearing-impaired listeners were tested in experiment 2. For some hearing-impaired subjects, masker frequencies of 1.5 kHz and 3 kHz were paired with a probe frequency of 3 kHz. MPPs measured for listeners with hearing loss had similar shapes for on- and off-frequency maskers. It was hypothesized that the shapes of MPPs reflect nonlinear processing at the level of the basilar membrane in normal hearing and more linear processing in impaired hearing. A model assuming different cochlear gains for normal versus impaired hearing and similar parameters of the temporal integrator for both groups of listeners successfully predicted the MPPs. (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 20:21:05