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    Underwater Acoustic Signatures of Recreational Swimmers, Divers, Surfers and Kayakers

    246321_246321.pdf (3.445Mb)
    Access Status
    Open access
    Authors
    Erbe, Christine
    Parsons, Miles
    Duncan, Alan
    Allen, Kim
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Erbe, C. and Parsons, M. and Duncan, A. and Allen, K. 2016. Underwater Acoustic Signatures of Recreational Swimmers, Divers, Surfers and Kayakers. Acoustics Australia. 44 (2): pp. 333-341.
    Source Title
    Acoustics Australia
    DOI
    10.1007/s40857-016-0062-7
    ISSN
    0814-6039
    School
    Centre for Marine Science and Technology
    Remarks

    Copyright © 2016 Australian Acoustical Society. Reproduced with permission.

    URI
    http://hdl.handle.net/20.500.11937/47625
    Collection
    • Curtin Research Publications
    Abstract

    © 2016 Australian Acoustical Society. Non-motorised, recreational water activities were recorded underwater in the controlled setting of a public swimming pool during the off-season. Individuals, one at a time, swam freestyle and breaststroke, snorkelled, scuba-dived, kicked a boogie board and a surfboard, kayaked, and simply jumped into the water. Underwater video and still images were recorded at the same time to interpret the sounds recorded. Most of the sound was due to bubbles generated underwater. Activities involving fins (flippers) were the loudest (boogie boarding and snorkelling), followed by freestyle swimming, surfboard paddling, and kayaking. Breaststroke generated the fewest bubbles and was the quietest. All activities produced bubbles, hence noise, at a characteristic temporal pattern. Scuba-diving exhibited two distinct noise spectra related to inhalation and exhalation. Received levels ranged from 110 to 131 dB re 1 µ Pa (10–16,000 Hz) for all of the activities at the closest point of approach (1 m). The results might have applicability to the monitoring of pools for security reasons, to performance assessments of swimmers, and to studies of the distances at which humans may be detectible by marine animals in the sea.

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