Biomimetic direction of arrival estimation for resolving front-back confusions in hearing aids

Archer-Boyd, A. W., Whitmer, W. M. , Brimijoin, W. O. and Soraghan, J. J. (2015) Biomimetic direction of arrival estimation for resolving front-back confusions in hearing aids. Journal of the Acoustical Society of America, 137(5), EL360-EL366. (doi: 10.1121/1.4918297) (PMID:25994734)

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Abstract

Sound sources at the same angle in front or behind a two-microphone array (e.g., bilateral hearing aids) produce the same time delay and two estimates for the direction of arrival: A front-back confusion. The auditory system can resolve this issue using head movements. To resolve front-back confusion for hearing-aid algorithms, head movement was measured using an inertial sensor. Successive time-delay estimates between the microphones are shifted clockwise and counterclockwise by the head movement between estimates and aggregated in two histograms. The histogram with the largest peak after multiple estimates predicted the correct hemifield for the source, eliminating the front-back confusions.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Whitmer, Dr William and Soraghan, Professor John
Authors: Archer-Boyd, A. W., Whitmer, W. M., Brimijoin, W. O., and Soraghan, J. J.
College/School:College of Medical Veterinary and Life Sciences > Institute of Health and Wellbeing > MRC/CSO SPHSU
College of Science and Engineering > School of Engineering
Journal Name:Journal of the Acoustical Society of America
Publisher:Acoustical Society of America
ISSN:0001-4966
ISSN (Online):1520-8524
Copyright Holders:Copyright © 2015 Acoustical Society of America
First Published:First published in Journal of the Acoustical Society of America 137(5):EL360-EL366
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher.

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