Frequency-dependent and longitudinal changes in noise-induced hearing loss in a bottlenose dolphin (Tursiops truncatus).
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.
Finneran
James J
JJ
US Navy Marine Mammal Program, Space and Naval Warfare Systems Center Pacific Code 7151, 53560 Hull Street, San Diego, California 92152, USA.
Schlundt
Carolyn E
CE
D000161:Acoustic Stimulation / Q000662:veterinary; D000818:Animals; D001309:Auditory Threshold; D050681:Bottle-Nosed Dolphin; D005260:Female; D006317:Hearing Loss, Noise-Induced / Q000209:etiology / Q000503:physiopathology / Q000662:veterinary*; D006320:Hearing Tests / Q000662:veterinary; D009622:Noise / Q000009:adverse effects*; D013997:Time Factors