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    Efficient modelling of mid to high frequency underwater acoustic propagation

    Access Status
    Fulltext not available
    Authors
    Duncan, Alexander
    Parnum, Iain
    Henley, Peter
    Date
    2013
    Type
    Conference Paper
    
    Metadata
    Show full item record
    Citation
    Duncan, Alec J. and Parnum, Iain M. and Henley, Peter J. 2013. Efficient modelling of mid to high frequency underwater acoustic propagation, in McMinn, T. (ed), Proceedings of Acoustics 2013 - Science, Technology and Amenity, Nov 17-20 2013, pp. 1-5. Victor Harbour, South Australia: Australian Acoustical Society.
    Source Title
    Efficient modelling of mid to high frequency underwater acoustic propagation
    Source Conference
    Acoustics 2013 - Science, Technology and Amenity
    Additional URLs
    http://www.acoustics.asn.au/conference_proceedings/AAS2013/papers/p69.pdf
    ISBN
    9780646912189
    URI
    http://hdl.handle.net/20.500.11937/34698
    Collection
    • Curtin Research Publications
    Abstract

    Accurate prediction of the acoustic interference field at mid to high frequencies is computationally intensive, even for ray theory based models, and is of little practical use because the fine detail of the interference pattern is sensitive to the exact values of environmental parameters, such as bathymetry and sound speed, that are inherently uncertain. This paper considers an alternative approach in which a much faster incoherent beam model is used to compute the mean acoustic field, and the interference is treated as a statistical process based on a Rayleigh amplitude distribution. Excellent agreement was found between interference field statistics obtained using this hybrid approach, and those resulting from a full coherent transmission loss calculation whenever the horizontal separation between source and receiver was sufficiently large that there were many contributing ray paths.

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