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Detection And Attenuation of Feedback Induced Howling in Hearing Aids Using Subband Zero-Crossing Measures
Responsible organisation
2005 (English)Conference paper, (Refereed) Published
Abstract [en]

A modern hearing aid should be aesthetically appealing as well as offer sufficient and adequate signal amplification. Due to the small physical size of these devices, acoustical feedback (howling) is a major problem. Apart from the annoyance and potential hearing damaging effects that howling implies, it also reduces the supplied maximum Real Ear Aided Gain (REAG). This paper proposes a novel method for subband feedback detection and cancellation, based on the zero-crossing rate measure. After splitting the hearing aid input signal into subbands, the distances between subband zero-crossings are measured. A low distance variance in a particular subband indicates that howling has arisen. The variance measure is then used to adaptively and continuously steer subband gain functions which attenuate tonal infested subbands. The method has proven to be robust and simulation indicates that it offers additional REAG of about 15 dB.

Place, publisher, year, edition, pages
Sydney, 2005.
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:bth-9935Local ID: oai:bth.se:forskinfo6A3C84D32BF5BEEFC125709100547643ISBN: 0-7803-9243-4 (print)OAI: oai:DiVA.org:bth-9935DiVA: diva2:837927
Conference
Proceedings of the Eighth International Symposium on Signal Processing and Its Applications
Available from: 2012-09-18 Created: 2005-10-05 Last updated: 2015-06-30Bibliographically approved

Open Access in DiVA

fulltext(176 kB)106 downloads
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Dahl, Mattias
Signal Processing

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf