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Titolo:
On the spectral periodicity of transient-evoked otoacoustic emissions fromnormal and damaged cochleas
Autore:
Avan, P; Wit, HP; Guitton, M; Mom, T; Bonfils, P;
Indirizzi:
Sch Med, Lab Sensory Biophys, Clermont Ferrand, France Sch Med Clermont Ferrand France nsory Biophys, Clermont Ferrand, France Acad Ziekenhuis, Dept Audiol, Groningen, Netherlands Acad Ziekenhuis Groningen Netherlands pt Audiol, Groningen, Netherlands Sensorimotor Syst & Format Associee Claude Bernar, UPRESA CNRS 7060, Paris, France Sensorimotor Syst & Format Associee Claude Bernar Paris France , France
Titolo Testata:
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
fascicolo: 3, volume: 108, anno: 2000,
parte:, 1
pagine: 1117 - 1127
SICI:
0001-4966(200009)108:3<1117:OTSPOT>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
OUTER HAIR-CELLS; ACOUSTIC EMISSIONS; PRETERM INFANTS; TRAVELING WAVES; GUINEA-PIG; FREQUENCY; HUMANS; STEREOCILIA; MECHANISMS; DISTORTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Engineering, Computing & Technology
Citazioni:
48
Recensione:
Indirizzi per estratti:
Indirizzo: Avan, P Sch Med, Lab Sensory Biophys, Clermont Ferrand, France Sch Med Clermont Ferrand France ophys, Clermont Ferrand, France
Citazione:
P. Avan et al., "On the spectral periodicity of transient-evoked otoacoustic emissions fromnormal and damaged cochleas", J ACOUST SO, 108(3), 2000, pp. 1117-1127

Abstract

The spectral quasi-periodicity of transient-evoked otoacoustic emissions (TEOAE) is well acknowledged since Zwicker described a preferred spacing of 0.4 bark between consecutive peaks in the spectrum of otoacoustic emissionsfrom normal ears. While there is scarce evidence of any anatomical reason for this regularity, several functional models of the cochlea have predicted that the structure of emission spectra reflects important characteristicsof cochlear filters. In an attempt to check such predictions, the average regularity of TEOAE spectra was studied in three groups of human subjects, normally hearing adults, healthy neonates, and adults suffering from noise-induced hearing loss. Significant differences in emission periodicities were found. Around 1 kHz, the preferred spacing was close to 130 Hz in normally hearing adult ears and neonates. In contrast, no clear periodicity was found in the group of damaged ears, even though they had clinically normal pure-tone audiometry below 2 kHz. Around 4 kHz, the preferred spacing was close to 240 Hz in normal adults and neonates, whereas TEOAEs were absent in many impaired ears. A phenomenological model assuming that TEOAEs stem from the responses of a slightly disarrayed bank of highly tuned filters predicts that the filter width would be the same in healthy young adults and neonates. In contrast, ears suffering from high-frequency hearing loss could exhibit early damaged filters. The proposed method might provide an objective assessment of parameters otherwise difficult to evaluate: especially in neonatal cochleas. (C) 2000 Acoustical Society of America. [S0001-4966(00)04209-0].

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 10:08:57