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

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


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.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Acoustic Stimulation / veterinary
  • Animals
  • Auditory Threshold*
  • Bottle-Nosed Dolphin*
  • Female
  • Hearing Loss, Noise-Induced / etiology
  • Hearing Loss, Noise-Induced / physiopathology
  • Hearing Loss, Noise-Induced / veterinary*
  • Hearing Tests / veterinary
  • Noise / adverse effects*
  • Time Factors