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Transient evoked otoacoustic emissions recorded using maximum length sequences from patients with sensorineural hearing loss

Transient evoked otoacoustic emissions recorded using maximum length sequences from patients with sensorineural hearing loss
Transient evoked otoacoustic emissions recorded using maximum length sequences from patients with sensorineural hearing loss
Much research has shown that transient evoked otoacoustic emissions (TEOAEs) can successfully separate normally hearing and hearing impaired populations. However, this finding comes from TEOAEs recorded using conventional averaging at low stimulation rates. Presenting clicks according to maximum length sequences (MLSs) enables TEOAEs to be recorded at very high stimulation rates. This study compares conventional and MLS TEOAEs in normally hearing and hearing impaired adults. Stimulus presentation rates of 40 clicks/s (conventional) and 5000 clicks/s (MLS) were used. The ‘linear’ TEOAEs (i.e., the directly recorded waveforms), the ‘level nonlinear’ (LNL) TEOAEs (i.e., those derived from two linear waveforms separated by a known difference in stimulus level) and the ‘rate nonlinear’ (RNL) TEOAEs (i.e., obtained by subtracting the emission recorded at 5000 clicks/s from that at 40 clicks/s at a fixed stimulus level) were examined to compare how they separated the normally hearing and hearing impaired subjects. When compared to the results for both conventional and MLS linear or LNL TEOAEs, the present study found that the RNL results best reflected the patients’ hearing loss, although the conventional linear and LNL responses performed nearly as well. Only two impaired ears (2%), both with a best threshold of 30 dB HL at 1000 Hz, produced RNL responses with amplitude within the range produced by 95% of the normal group.
evoked otoacoustic emissions, maximum length sequences, hearing loss
0378-5955
122-133
Hine, Jemma E.
0e44b28c-4f48-44d6-b91c-55ecb7e4f654
Thornton, A. Roger D.
d3dff0a6-a361-48d8-ba77-7264343e8fce
Hine, Jemma E.
0e44b28c-4f48-44d6-b91c-55ecb7e4f654
Thornton, A. Roger D.
d3dff0a6-a361-48d8-ba77-7264343e8fce

Hine, Jemma E. and Thornton, A. Roger D. (2005) Transient evoked otoacoustic emissions recorded using maximum length sequences from patients with sensorineural hearing loss. Hearing Research, 203 (1-2), 122-133. (doi:10.1016/j.heares.2004.11.019).

Record type: Article

Abstract

Much research has shown that transient evoked otoacoustic emissions (TEOAEs) can successfully separate normally hearing and hearing impaired populations. However, this finding comes from TEOAEs recorded using conventional averaging at low stimulation rates. Presenting clicks according to maximum length sequences (MLSs) enables TEOAEs to be recorded at very high stimulation rates. This study compares conventional and MLS TEOAEs in normally hearing and hearing impaired adults. Stimulus presentation rates of 40 clicks/s (conventional) and 5000 clicks/s (MLS) were used. The ‘linear’ TEOAEs (i.e., the directly recorded waveforms), the ‘level nonlinear’ (LNL) TEOAEs (i.e., those derived from two linear waveforms separated by a known difference in stimulus level) and the ‘rate nonlinear’ (RNL) TEOAEs (i.e., obtained by subtracting the emission recorded at 5000 clicks/s from that at 40 clicks/s at a fixed stimulus level) were examined to compare how they separated the normally hearing and hearing impaired subjects. When compared to the results for both conventional and MLS linear or LNL TEOAEs, the present study found that the RNL results best reflected the patients’ hearing loss, although the conventional linear and LNL responses performed nearly as well. Only two impaired ears (2%), both with a best threshold of 30 dB HL at 1000 Hz, produced RNL responses with amplitude within the range produced by 95% of the normal group.

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More information

Published date: 2005
Keywords: evoked otoacoustic emissions, maximum length sequences, hearing loss

Identifiers

Local EPrints ID: 27590
URI: http://eprints.soton.ac.uk/id/eprint/27590
ISSN: 0378-5955
PURE UUID: 37cf4ea3-e78a-43af-bdb8-c698bac50da7

Catalogue record

Date deposited: 25 Apr 2006
Last modified: 15 Mar 2024 07:19

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Contributors

Author: Jemma E. Hine
Author: A. Roger D. Thornton

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