Role of Active Listening and Listening Effort on Contralateral Suppression of Transient Evoked Otoacousic Emissions

Kalaiah, Mohan Kumar and Theruvan, Nikhitha B and *, Kaushlendra Kumar and Bhat, Jayashree S. (2017) Role of Active Listening and Listening Effort on Contralateral Suppression of Transient Evoked Otoacousic Emissions. Korean Journal of Audiology, 21 (1). pp. 1-8. ISSN 20929862

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Abstract

Background and Objectives: The present study aimed to investigate the effect of active listening and listening effort on the contralateral suppression of transient evoked otoacoustic emissions (CSTEOAEs). Subjects and Methods: Twenty eight young adults participated in the study. Transient evoked otoacoustic emissions (TEOAEs) were recorded using ‘linear’ clicks at 60 dB peSPL, in three contralateral noise conditions. In condition 1, TEOAEs were obtained in the presence of white noise in the contralateral ear. While, in condition 2, speech was embedded into white noise at +3, -3, and -9 dB signal-tonoise ratio (SNR) and delivered to the contralateral ear. The SNR was varied to investigate the effect of listening effort on the CSTEOAE. In condition 3, speech was played backwards and embedded into white noise at -3 dB SNR. The conditions 1 and 3 served as passive listening condition and the condition 2 served as active listening condition. In active listening condition, the participants categorized the words in to two groups (e.g., animal and vehicle). Results: CSTEOAE was found to be largest in the presence of white noise, and the amount of CSTEOAE was not significantly different between active and passive listening conditions (condition 2 and 3). Listening effort had an effect on the CSTEOAE, the amount of suppression increased with listening effort, when SNR was decreased from +3 dB to -3 dB. However, when the SNR was further reduced to -9 dB, there was no further increase in the amount of CSTEOAE, instead there was a reduction in the amount of suppression. Conclusions: The findings of the present study show that listening effort might affect CSTEOAE.

Item Type: Article
Uncontrolled Keywords: OAE · Active listening · TEOAE suppression · Listening effort.
Subjects: Allied Health > Mangalore Campus > Speech and Hearing
Depositing User: KMCMLR User
Date Deposited: 15 Apr 2017 09:32
Last Modified: 15 Apr 2017 09:32
URI: http://eprints.manipal.edu/id/eprint/148714

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