Personalized signal-independent beamforming for binaural hearing aids

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Title: Personalized signal-independent beamforming for binaural hearing aids
Authors: Moore, AH
De Haan, JM
Pedersen, MS
Brookes, D
Naylor, PA
Jensen, J
Item Type: Journal Article
Abstract: The effect of personalized microphone array calibration on the performance of hearing aid beamformers under noisy reverberant conditions is studied. The study makes use of a new, publicly available, database containing acoustic transfer function measurements from 29 loudspeakers arranged on a sphere to a pair of behind-the-ear hearing aids in a listening room when worn by 27 males, 14 females, and 4 mannequins. Bilateral and binaural beamformers are designed using each participant's hearing aid head-related impulse responses (HAHRIRs). The performance of these personalized beamformers is compared to that of mismatched beamformers, where the HAHRIR used for the design does not belong to the individual for whom performance is measured. The case where the mismatched HAHRIR is that of a mannequin is of particular interest since it represents current practice in commercially available hearing aids. The benefit of personalized beamforming is assessed using an intrusive binaural speech intelligibility metric and in a matrix speech intelligibility test. For binaural beamforming, both measures demonstrate a statistically signficant (p < 0.05) benefit of personalization. The benefit varies substantially between individuals with some predicted to benefit by as much as 1.5 dB.
Issue Date: 31-May-2019
Date of Acceptance: 24-Apr-2019
ISSN: 0001-4966
Publisher: Acoustical Society of America
Start Page: 2971
End Page: 2981
Journal / Book Title: Journal of the Acoustical Society of America
Volume: 145
Issue: 5
Copyright Statement: © 2019 Acoustical Society of America
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/M026698/1
Keywords: Acoustics
MD Multidisciplinary
Publication Status: Published
Embargo Date: 2019-11-16
Article Number: 2971
Online Publication Date: 2019-05-16
Appears in Collections:Faculty of Engineering
Electrical and Electronic Engineering

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