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An optical telemetry device to identify which dolphin produces a sound
Tyack, P.L. (1985). An optical telemetry device to identify which dolphin produces a sound. J. Acoust. Soc. Am. 78(5): 1892-1895
In: The Journal of the Acoustical Society of America. American Institute of Physics: New York, etc. ISSN 0001-4966, more
Peer reviewed article  

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Keyword
    Marine

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  • Tyack, P.L.

Abstract
    A small telemetry device, called a "vocalight',' was designed for attachment to a dolphin's head using a suction cup. The vocalight lights up a variable number of light-emitting diodes depending upon the loudness of sounds received at a hydrophone within the suction cup. If vocalights matched for sensitivity are put on each dolphin within a captive group, observers can identify which dolphin produces a vocalization. Use of vocalights indicates that source levels of whistles from captive bottlenosed dolphins, Tursiops truncatus, range from approximately 125 to over 140 dB re: 1 µPa at 1 m.

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