Two microphone acoustic feedback cancellation in digital hearing aids: A step size controlled frequency domain approach

Pradhan, S; George, NV; Albu, F; Nordholm, S

Two microphone acoustic feedback cancellation in digital hearing aids: A step size controlled frequency domain approach

Pradhan, S

George, NV Albu, F Nordholm, S

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Publication Type:: Journal Article
Citation:: Applied Acoustics, 2018, 132 pp. 142 - 151
Issue Date:: 2018-03-01

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Field	Value	Language
dc.contributor.author	Pradhan, S https://orcid.org/0000-0002-7463-0932	en_US
dc.contributor.author	George, NV	en_US
dc.contributor.author	Albu, F	en_US
dc.contributor.author	Nordholm, S	en_US
dc.date.issued	2018-03-01	en_US
dc.identifier.citation	Applied Acoustics, 2018, 132 pp. 142 - 151	en_US
dc.identifier.issn	0003-682X	en_US
dc.identifier.uri	http://hdl.handle.net/10453/131643
dc.description.abstract	© 2017 Elsevier Ltd The feedback cancellation performance of behind the ear hearing aids can be improved by employing two microphones in the feedback cancellation process. A frequency domain implementation of feedback cancellation in a two microphone behind the ear hearing aid has been proposed in this paper. A frequency domain step size control scheme has been further introduced to improve the convergence behaviour. The implementation of a the frequency domain step size control method requires the microphone input signal as well as the loudspeaker output signal to be uncorrelated. In order to reduce the correlation effects and enable such an implementation, we have incorporated frequency shifting in the forward path. The proposed approach has been shown to provide improved convergence behaviour as well as offer enhanced speech quality. Further, the proposed scheme is expected to offer a reduced computational load for longer feedback paths.	en_US
dc.relation.ispartof	Applied Acoustics	en_US
dc.relation.isbasedon	10.1016/j.apacoust.2017.11.015	en_US
dc.subject.classification	Acoustics	en_US
dc.title	Two microphone acoustic feedback cancellation in digital hearing aids: A step size controlled frequency domain approach	en_US
dc.type	Journal Article
utslib.citation.volume	132	en_US
utslib.for	0203 Classical Physics	en_US
utslib.for	0913 Mechanical Engineering	en_US
utslib.for	1201 Architecture	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Students
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	132	en_US

Abstract:

© 2017 Elsevier Ltd The feedback cancellation performance of behind the ear hearing aids can be improved by employing two microphones in the feedback cancellation process. A frequency domain implementation of feedback cancellation in a two microphone behind the ear hearing aid has been proposed in this paper. A frequency domain step size control scheme has been further introduced to improve the convergence behaviour. The implementation of a the frequency domain step size control method requires the microphone input signal as well as the loudspeaker output signal to be uncorrelated. In order to reduce the correlation effects and enable such an implementation, we have incorporated frequency shifting in the forward path. The proposed approach has been shown to provide improved convergence behaviour as well as offer enhanced speech quality. Further, the proposed scheme is expected to offer a reduced computational load for longer feedback paths.

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http://hdl.handle.net/10453/131643