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    Bio-Duck Activity in the Perth Canyon. An Automatic Detection Algorithm.

    Access Status
    Open access via publisher
    Authors
    McCauley, Robert
    Matthews, Dave
    Macleod, Rodney
    Date
    2004
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    McCauley, R. and Matthews, D. and Macleod, R. 2004. Bio-Duck Activity in the Perth Canyon. An Automatic Detection Algorithm. Acoustics Australia. Proceedings of Acoustics 2004, Acoustics Australia.
    Source Title
    Acoustics Australia
    Additional URLs
    https://www.acoustics.asn.au/conference_proceedings/AAS2004/ACOUSTIC/PDF/AUTHOR/AC040012.PDF
    ISSN
    1839-2571
    Faculty
    Faculty of Science and Engineering
    School
    School of Earth and Planetary Sciences (EPS)
    URI
    http://hdl.handle.net/20.500.11937/80328
    Collection
    • Curtin Research Publications
    Abstract

    Recently analysed data from Curtin University has revealed a significant amount of “bio-duck” activity in the Perth Canyon during December 2002. The name “bio-duck” originates from sonar operators on board the old Oberon class submarines who thought that the sound resembled that of a duck. Surprisingly this is not the case for the Curtin data. The difference however may be due to onboard audio processing prior to the operators hearing the sound that was absent in the Curtin data. It should also be noted that for both data sets the origin of the sound is unknown. For the recent data there exists two distinct types of call. One long period (T~3.1 sec) and one short period (T~1.6 sec) covering the frequency range 60 Hz < f < 1000 Hz. This could have major implications on the operations of some of the sonar on-board the Collins class submarines. Consequently an algorithm was written to automatically detect the presence of bio-duck. In order to eliminate the effect of amplitude variations between data files a signal-time ratio method was used for a third octave band centred around 125 Hz. The reliability of this algorithm was estimated by comparing it’s output with that of the manual analysis of 2240 data files (23 days). It was found to have a 93% success rate in detecting the bio-duck. This will allow quick analyse of large amounts of data to investigate annual variations and also give a method for automatic detection on board the submarines. The results will be discussed.

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    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.