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Performance Evaluation of Acoustic Feedback Cancellation Methods in Single-Microphone and Multiple-Loudspeakers Public Address Systems

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E-Business and Telecommunications (ICETE 2014)

Part of the book series: Communications in Computer and Information Science ((CCIS,volume 554))

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Abstract

Acoustic feedback limits the maximum stable gain (MSG) of a public address (PA) system and thereby may make the system unstable. Acoustic feedback cancellation methods use an adaptive filter to identify the acoustic feedback path and remove its influence from the system. However, if the traditional adaptive filtering algorithms are used, a bias is introduced in the adaptive filter coefficients. Several methods have been proposed to overcome the bias problem but their performances are generally evaluated in PA systems with only one microphone and one loudspeaker. This work evaluates the performance of some state-of-art methods in a PA system with one microphone and four loudspeakers, which is a more practical configuration of such a system, with respect to the increase in MSG, estimate of the feedback path and sound quality. Simulation results demonstrated that, when the source signal is speech, the method based on the cepstrum of the error signal has the best overall performance and can increase in 30.6 dB the MSG of the PA system.

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Acknowledgements

The authors would like to acknowledge the financial support provided by the FCT (Portuguese National Science and Technology Foundation) through the scholarship SFRH/BD/49038/2008.

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Authors and Affiliations

  1. University of Porto, Porto, Portugal

    Bruno C. Bispo & Diamantino Freitas

Authors
  1. Bruno C. Bispo
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  2. Diamantino Freitas
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Corresponding author

Correspondence to Bruno C. Bispo .

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Editors and Affiliations

  1. Rose Hill and Lincoln Center Campuses, Fordham University, Bronx, New York, USA

    Mohammad S. Obaidat

  2. Medical Informatis, Statistics, Document, Medical University Graz, Graz, Austria

    Andreas Holzinger

  3. INSTICC, Polytechnic Institute of Setúbal, Setúbal, Portugal

    Joaquim Filipe

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Bispo, B.C., Freitas, D. (2015). Performance Evaluation of Acoustic Feedback Cancellation Methods in Single-Microphone and Multiple-Loudspeakers Public Address Systems. In: Obaidat, M., Holzinger, A., Filipe, J. (eds) E-Business and Telecommunications. ICETE 2014. Communications in Computer and Information Science, vol 554. Springer, Cham. https://doi.org/10.1007/978-3-319-25915-4_25

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  • DOI: https://doi.org/10.1007/978-3-319-25915-4_25

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-25914-7

  • Online ISBN: 978-3-319-25915-4

  • eBook Packages: Computer ScienceComputer Science (R0)

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