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A frequency-selective feedback model of auditory efferent suppression and its implications for the recognition of speech in noise

Clark, N and Brown, G and Juergens, T and Meddis, R (2012) 'A frequency-selective feedback model of auditory efferent suppression and its implications for the recognition of speech in noise.' Journal of the Acoustical Society of America, 123 (3). pp. 1535-1541. ISSN 0001-4966

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Abstract

The potential contribution of the peripheral auditory efferent system to our understanding of speech in a background of competing noise was studied using a computer model of the auditory periphery and assessed using an automatic speech recognition system. A previous study had shown that a fixed efferent attenuation applied to all channels of a multi-channel model could improve the recognition of connected digit triplets in noise [G. J. Brown, R. T. Ferry, and R. Meddis, J. Acoust. Soc. Am. 127, 943?954 (2010)]. In the current study an anatomically justified feedback loop was used to automatically regulate separate attenuation values for each auditory channel. This arrangement resulted in a further enhancement of speech recognition over fixed-attenuation conditions. Comparisons between multi-talker babble and pink noise interference conditions suggest that the benefit originates from the model?s ability to modify the amount of suppression in each channel separately according to the spectral shape of the interfering sounds.

Item Type: Article
Uncontrolled Keywords: acoustic noise; acoustic wave interference; feedback; hearing; speech recognition
Subjects: Q Science > QP Physiology
Divisions: Faculty of Science and Health
Faculty of Science and Health > Psychology, Department of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 28 Mar 2013 10:02
Last Modified: 15 Jan 2022 01:07
URI: http://repository.essex.ac.uk/id/eprint/5940

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