Research article summary:

Objective estimates of cochlear tuning by otoacoustic emission analysis.

Abstract Extract:
A new method is presented for estimating cochlear tuning starting from measurements of either the transient evoked otoacoustic emission latency or the spontaneous otoacoustic emission minimal spacing. This method could be useful in obtaining indirect ... (Full abstract text below)

Published 2003Jan in Journal: J Acoust Soc Am (Language : eng)

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1. J Acoust Soc Am. 2003 Jan;113(1):423-9

Objective estimates of cochlear tuning by otoacoustic emission analysis.

Moleti A, Sisto R

Dipartimento di Fisica, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 1, 00133 Roma, Italy. arturo.moleti@roma2.infn.it

A new method is presented for estimating cochlear tuning starting from measurements of either the transient evoked otoacoustic emission latency or the spontaneous otoacoustic emission minimal spacing. This method could be useful in obtaining indirect information about the tuning curve, particularly for subjects that, like neonates, cannot be studied with psycho-acoustical techniques. Theoretical models of the acoustic transmission along the cochlea based on the transmission line formalism predict a relation between the otoacoustic emission latency and the frequency. This relation depends on the tuning curve, i.e., the frequency dependence of the quality factor of the cochlear resonances. On the other hand, models for the generation of spontaneous emissions based on the concept of coherent scattering from cochlear random inhomogeneities imply an independent relation between the tuning curve and the minimal frequency spacing between spontaneous emissions. In this study, experimental measurements of the otoacoustic emission latency and of the minimal spacing between spontaneous emissions are presented. Theoretical relations are derived, which connect these two measured quantities and the tuning curve. The typically longer latency of neonates implies a higher degree of tuning at high levels of stimulation.

PMID : 12558279 [PubMed - Indexed for MEDLINE]

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Full Author Information

First Name	LastName	Initials
Arturo	Moleti	A
Renata	Sisto	R

Affiliation: Dipartimento di Fisica, Università di Roma Tor Vergata, Via della Ricerca Scientifica, 1, 00133 Roma, Italy. arturo.moleti@roma2.infn.it

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