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Titolo:
Noise enhances modulation sensitivity in cochlear implant listeners: Stochastic resonance in a prosthetic sensory system?
Autore:
Chatterjee, M; Robert, ME;
Indirizzi:
House Ear Inst, Dept Auditory Implants & Percept, Los Angeles, CA 90057 USA House Ear Inst Los Angeles CA USA 90057 ercept, Los Angeles, CA 90057 USA
Titolo Testata:
JARO
fascicolo: 2, volume: 2, anno: 2001,
pagine: 159 - 171
SICI:
1525-3961(200106)2:2<159:NEMSIC>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
AUDITORY-NERVE FIBERS; ELECTRICAL-STIMULATION; LOUDNESS GROWTH; THRESHOLD; PATTERNS; HEARING; VOWEL;
Keywords:
cochlear implants; stochastic resonance; noise; modulation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Chatterjee, M House Ear Inst, Dept Auditory Implants & Percept, 2100 W 3rdSt, Los Angeles, CA 90057 USA House Ear Inst 2100 W 3rd St Los Angeles CA USA 90057 57 USA
Citazione:
M. Chatterjee e M.E. Robert, "Noise enhances modulation sensitivity in cochlear implant listeners: Stochastic resonance in a prosthetic sensory system?", JARO, 2(2), 2001, pp. 159-171

Abstract

Cochlear implants restore auditory sensitivity to the profoundly hearing-impaired by means of electrical stimulation of residual auditory nerve fibers. Sensorineural hearing loss results in a loss of spontaneous activity among the remaining auditory neurons and is accompanied by a reduction in the normal stochastic nature of neural firing in response to electric stimulation. It has been hypothesized that the natural stochasticity of the neural response is important for auditory signal processing and that introducing some optimal amount of noise into the stimulus may improve auditory perception through the implant. In this article we show that, for soft but audible stimuli, an optimal amount of "prosthetic" noise significantly improves sensitivity to envelope modulation in cochlear implant listeners. A nonmonotonic function relates modulation sensitivity and noise level, suggesting the presence of stochastic resonance.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 20:00:02