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J Acoust Soc Am. 2010 Aug;128(2):567-70. doi: 10.1121/1.3458814.

Frequency-dependent and longitudinal changes in noise-induced hearing loss in a bottlenose dolphin (Tursiops truncatus).

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US Navy Marine Mammal Program, Space and Naval Warfare Systems Center Pacific Code 7151, 53560 Hull Street, San Diego, California 92152, USA.


Temporary threshold shift (TTS) was measured in a bottlenose dolphin (Tursiops truncatus) after exposure to 16-s tones at 3 and 20 kHz to examine the effects of exposure frequency on the onset and growth of TTS. Thresholds were measured approximately one-half octave above the exposure frequency using a behavioral response paradigm featuring an adaptive staircase procedure. Preliminary data provide evidence of frequency-specific differences in TTS onset and growth, and increased susceptibility to auditory fatigue after exposure to 3-kHz tones compared to data obtained two years earlier.

[Indexed for MEDLINE]

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