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    Evaluation of two-microphone acoustic feedback cancellation using uniform and non-uniform sub-bands in hearing AIDS

    Access Status
    Fulltext not available
    Authors
    Tran, Linh T.T.
    Dam, Hai Huyen Heidi
    Schepker, H.
    Doclo, S.
    Nordholm, Sven
    Date
    2016
    Type
    Conference Paper
    
    Metadata
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    Citation
    Tran, L. and Dam, H.H.H. and Schepker, H. and Doclo, S. and Nordholm, S. 2016. Evaluation of two-microphone acoustic feedback cancellation using uniform and non-uniform sub-bands in hearing AIDS, Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC), 16-19 Dec. 2015, pp. 308-313: IEEE.
    Source Title
    2015 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC)
    DOI
    10.1109/APSIPA.2015.7415527
    ISBN
    9789881476807
    School
    Department of Mathematics and Statistics
    URI
    http://hdl.handle.net/20.500.11937/50764
    Collection
    • Curtin Research Publications
    Abstract

    The limiting feature of hearing aids is acoustic feedback. This feedback problem has been approached by using an acoustic feedback canceller. This well known identification in a loop problem, will give a biased solution due to correlation between the desired and loudspeaker signals. Speech and music signals have long tails in the correlation. As a result, the performance of the system is considerably degraded and under certain conditions the cancellation system will be unstable. The two-microphone techniques have the potential to significantly reduce this problem. This paper introduces the applications of uniform and non-uniform sub-band techniques into the two-microphone acoustic feedback cancellation (AFC-2mics) to decorrelate input signals and individually adapt solutions in those bands. The system has been evaluated in terms of Misalignment (MisAL) and Maximum Stable Gain (MSG) using both male and female speech input signals. The simulation results show that our proposed methods provide better performance than the other existing methods. © 2015 Asia-Pacific Signal and Information Processing Association.

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    • 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 ...
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      Schepker, H.; Tran, L.; Nordholm, Sven; Doclo, S. (2017)
      © 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 ...
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      Schepker, H.; Tran, Linh T.T.; Nordholm, Sven; Doclo, S. (2016)
      In adaptive feedback cancellation an adaptive filter is used to model the acoustic feedback path between the hearing aid loudspeaker and the microphone. An important parameter for adaptive filters is the step-size, providing ...
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