Are normal hearing thresholds a sufficient condition for click-evoked otoacoustic emissions?

The Journal of the Acoustical Society of America
S Kapadia, M E Lutman

Abstract

Transiently evolked otoacoustic emissions (TEOAE) have been reported in several studies as absent in a small minority of normal ears. Other studies have reported TEOAEs in all normal ears. Differences between studies may arise directly from criteria for TEOAE identification, criteria for selection of normals, or statistically due to limited sample sizes. In order to understand and model cochlear processes involved in TEOAE generation, it needs to be known whether the presence of normal hearing leads automatically to generation of TEOAEs. The present study set out to establish in a large sample if any ears could be found that lacked TEOAEs despite normal hearing threshold levels (HTL). A total of 397 ears from highly cooperative adult subjects were examined under laboratory conditions. Using cross correlation between replicate nonlinear waveforms as the criterion, TEOAEs were present in 99.2% of the sample (lower CI 98.1%). However, careful visual assessment of the recorded waveforms for the remaining ears did not unequivocally show absence of TEOAE characteristics in any ear with normal HTLs. While TEOAE strength varies widely among ears, no clear evidence was found to show that TEOAEs can be absent when HTLs are normal.

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Citations

Jan 2, 2014·Indian Journal of Otolaryngology and Head and Neck Surgery : Official Publication of the Association of Otolaryngologists of India·Prawin KumarAnimesh Barman
Jan 11, 2007·Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery·Jurek OlszewskiJoanna Majak
Sep 18, 2003·American Journal of Otolaryngology·Thierry MorletChantal Ferber-Viart
Sep 29, 2000·The Journal of the Acoustical Society of America·P AvanP Bonfils
Apr 25, 2007·International Journal of Audiology·Stavros HatzopoulosAlessandro Martini
May 28, 2005·Trends in Amplification·Gary Rance
Nov 8, 2017·Ear and Hearing·Welen Weilu ChenBradley McPherson
Nov 5, 1999·Audiology : Official Organ of the International Society of Audiology·A J Hall, M E Lutman
Dec 5, 2016·The Journal of the Acoustical Society of America·Ian B Mertes, Marjorie R Leek
Nov 5, 1999·Audiology : Official Organ of the International Society of Audiology·S Kapadia, M E Lutman
Dec 3, 2020·The Journal of the Acoustical Society of America·James D Lewis

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