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Titolo:
REVERSE MIDDLE-EAR TRANSFER-FUNCTION IN THE GUINEA-PIG MEASURED WITH CUBIC DIFFERENCE TONES
Autore:
MAGNAN P; AVAN P; DANCER A; SMURZYNSKI J; PROBST R;
Indirizzi:
INST FRANCO ALLEMAND RECH F-68301 ST LOUIS FRANCE UNIV AUVERGNE,BIOPHYS LAB F-63001 CLERMONT FERRAN FRANCE UNIV BASEL,KANTONSSPITAL,KLIN HNO CH-4031 BASEL SWITZERLAND
Titolo Testata:
Hearing research
fascicolo: 1-2, volume: 107, anno: 1997,
pagine: 41 - 45
SICI:
0378-5955(1997)107:1-2<41:RMTITG>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACOUSTIC DISTORTION PRODUCTS; OTOACOUSTIC EMISSIONS; COCHLEAR MECHANICS; BASILAR-MEMBRANE; ORIGIN; RABBIT; GAIN;
Keywords:
CUBIC DIFFERENCE TONE; DISTORTION PRODUCT OTOACOUSTIC EMISSION; INTRACOCHLEAR PRESSURE MEASUREMENT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
P. Magnan et al., "REVERSE MIDDLE-EAR TRANSFER-FUNCTION IN THE GUINEA-PIG MEASURED WITH CUBIC DIFFERENCE TONES", Hearing research, 107(1-2), 1997, pp. 41-45

Abstract

Otoacoustic emissions are increasingly useful for determining cochlear function noninvasively. It is widely agreed that these acoustic signals reflect micromechanical processes in the cochlea. However, their quantitative interpretation requires knowledge of the ways in which vibrations travelling back to the ear canal from the cochlea are shaped by the middle ear. An intracochlear source is needed to derive the reverse middle-ear transfer function (rMETF) by comparing pressure in the external ear canal to the corresponding pressure in scala vestibuli. In the present study, the rMETF was obtained in vivo in the guinea pig using as intracochlear sound source the cubic difference tones (CDTs) generated by a pair of external pure tones. With a closed ear canal and open bulla, the rMETF was found to be flat (-35 dB) over a broad frequency range (1.5-8 kHz). The differences between forward and reverse METF could be explained by different loads acting on the middle ear network, which depends on the direction of signal transmission. With knowledge of the rMETF, it becomes possible to quantify CDTs within the cochlea by measuring them noninvasively in the ear canal.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/11/20 alle ore 07:21:06