Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Null-steering beamformer for acoustic feedback cancellation in a multi-microphone earpiece optimizing the maximum stable gain

    Access Status
    Fulltext not available
    Authors
    Schepker, H.
    Tran, L.
    Nordholm, Sven
    Doclo, S.
    Date
    2017
    Type
    Conference Paper
    
    Metadata
    Show full item record
    Citation
    Schepker, H. and Tran, L. and Nordholm, S. and Doclo, S. 2017. Null-steering beamformer for acoustic feedback cancellation in a multi-microphone earpiece optimizing the maximum stable gain, pp. 341-345.
    Source Title
    ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
    DOI
    10.1109/ICASSP.2017.7952174
    ISBN
    9781509041176
    School
    Department of Electrical and Computer Engineering
    URI
    http://hdl.handle.net/20.500.11937/55613
    Collection
    • Curtin Research Publications
    Abstract

    © 2017 IEEE. Commonly adaptive filters are used to reduce the acoustic feedback in hearing aids. While theoretically allowing for perfect cancellation of the feedback signal, in practice the adaptive filter solution is typically biased due to the closed-loop hearing aid system. In contrast to conventional behind-the-ear hearing aids, in this paper we consider an earpiece with multiple integrated microphones. For such an earpiece it has previously been proposed to use a fixed beamformer to reduce the acoustic feedback in the microphones which has been designed to minimize a least-squares cost function. In this paper we propose to design the beamformer by minimizing a min-max cost function which directly maximizes the maximum stable gain of the earpiece. Furthermore, we propose a robust extension of the min-max cost function maximizing the worst-case maximum stable gain over a set of acoustic feedback paths. Experimental results using measured acoustic feedback paths show that the feedback cancellation performance of the fixed beamformer can be considerably improved by minimizing the proposed min-max optimization problem, while maintaining a high perceptual quality of the incoming signal.

    Related items

    Showing items related by title, author, creator and subject.

    • Combining null-steering and adaptive filtering for acoustic feedback cancellation in a multi-microphone earpiece
      Schepker, H.; Tran, Linh Thi Thuc; Nordholm, Sven; Doclo, Simon (2017)
      © EURASIP 2017. Commonly adaptive filters are used to reduce the acoustic feedback in hearing aids. While theoretically allowing for perfect cancellation of the feedback signal, in practice the adaptive filter solution ...
    • Acoustic feedback cancellation for a multi-microphone earpiece based on a null-steering beamformer
      Schepker, H.; Tran, Linh T.T.; Nordholm, Sven; Doclo, S. (2016)
      In order to reduce acoustic feedback in hearing aids, adaptive filters are commonly used to estimate the feedback contribution in the microphone(s). While theoretically allowing for perfect feedback cancellation, in ...
    • Robust beamformer design against mismatch in microphone characteristics and acoustic environment
      Nahma, L.; Dam, Hai Huyen Heidi; Nordholm, Sven (2018)
      © 2018 IEEE. Broadband beamformers are known to be sensitive not only to mismatches in microphone characteristics but also in the acoustic environment. In this work, we propose a robust broadband beamformer design using ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.