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    Automatic detection of echolocation clicks based on a Gabor model of their waveform

    231347_231347.pdf (1.087Mb)
    Access Status
    Open access
    Authors
    Madhusudhana, S.
    Gavrilov, Alexander
    Erbe, Christine
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Madhusudhana, S. and Gavrilov, A. and Erbe, C. 2015. Automatic detection of echolocation clicks based on a Gabor model of their waveform. Journal of the Acoustical Society of America. 137 (6): pp. 3077-3086.
    Source Title
    Journal of the Acoustical Society of America
    DOI
    10.1121/1.4921609
    ISSN
    0001-4966
    School
    Centre for Marine Science and Technology
    Remarks

    Copyright © 2015 Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.

    URI
    http://hdl.handle.net/20.500.11937/34540
    Collection
    • Curtin Research Publications
    Abstract

    Prior research has shown that echolocation clicks of several species of terrestrial and marine fauna can be modelled as Gabor-like functions. Here, a system is proposed for the automatic detection of a variety of such signals. By means of mathematical formulation, it is shown that the output of the Teager–Kaiser Energy Operator (TKEO) applied to Gabor-like signals can be approximated by a Gaussian function. Based on the inferences, a detection algorithm involving the post-processing of the TKEO outputs is presented. The ratio of the outputs of two moving-average filters, a Gaussian and a rectangular filter, is shown to be an effective detection parameter. Detector performance is assessed using synthetic and real (taken from MobySound database) recordings. The detection method is shown to work readily with a variety of echolocation clicks and in various recording scenarios. The system exhibits low computational complexity and operates several times faster than real-time. Performance comparisons are made to other publicly available detectors including PAMGUARD.

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