U.S. Navy Marine Mammal Program, Space and Naval Warfare Systems Center Pacific, Code 71510, 53560 Hull Street, San Diego, California 92152, USA.
J Acoust Soc Am. 2013 Mar;133(3):1819-26. doi: 10.1121/1.4776211.
Temporary threshold shift (TTS) was measured in two bottlenose dolphins (Tursiops truncatus) after exposure to 16-s tones between 3 and 80 kHz to examine the effects of exposure frequency on the onset, growth, and recovery of TTS. Hearing thresholds were measured approximately one-half octave above the exposure frequency using a behavioral response paradigm featuring an adaptive staircase procedure. Results show frequency-specific differences in TTS onset and growth, and suggest increased susceptibility to auditory fatigue for frequencies between approximately 10 and 30 kHz. Between 3 and 56 kHz, the relationship between exposure frequency and the exposure level required to induce 6 dB of TTS, measured 4 min post-exposure, agrees closely with an auditory weighting function for bottlenose dolphins developed from equal loudness contours [Finneran and Schlundt. (2011). J. Acoust. Soc. Am. 130, 3124-3136].
在对 3 至 80 kHz 之间的 16 秒音进行暴露后，对两只宽吻海豚（Tursiops truncatus）进行了暂时阈移（TTS）测量，以研究暴露频率对 TTS 的发生、增长和恢复的影响。使用基于自适应阶梯程序的行为反应范式，在暴露频率以上约半音程处测量听力阈值。结果表明 TTS 发生和增长存在频率特异性差异，并表明在大约 10 至 30 kHz 的频率范围内，听觉疲劳的敏感性增加。在 3 至 56 kHz 之间，与在暴露后 4 分钟测量的引起 6 dB TTS 所需的暴露水平之间的关系，与 Finneran 和 Schlundt （2011 年）从等响曲线得出的宽吻海豚听觉加权函数密切一致。[J. Acoust. Soc. Am. 130, 3124-3136]。
