大西洋宽吻海豚（瓶鼻海豚）噪声暴露后的暂时性阈移及恢复情况

Temporary threshold shifts and recovery following noise exposure in the Atlantic bottlenosed dolphin (Tursiops truncatus).

作者信息

Nachtigall Paul E, Pawloski Jeffrey L, Au Whitlow W L

机构信息

Marine Mammal Research Program, Hawaii Institute of Marine Biology, University of Hawaii, P.O. Box 1106, Kailua, Hawaii 96734, USA.

出版信息

J Acoust Soc Am. 2003 Jun;113(6):3425-9. doi: 10.1121/1.1570438.

DOI:10.1121/1.1570438

PMID:12822812

Abstract

Behaviorally determined hearing thresholds for a 7.5-kHz tone for an Atlantic bottlenosed dolphin (Tursiops truncatus) were obtained following exposure to fatiguing low-frequency octave band noise. The fatiguing stimulus ranged from 4 to 11 kHz and was gradually increased in intensity to 179 dB re 1 microPa and in duration to 55 min. Exposures occurred no more frequently than once per week. Measured temporary threshold shifts averaged 11 dB. Threshold determination took at least 20 min. Recovery was examined 360, 180, 90, and 45 min following exposure and was essentially complete within 45 min.

摘要

在让一只大西洋宽吻海豚（瓶鼻海豚）暴露于疲劳性低频倍频程带噪声之后，获得了该海豚对于7.5千赫纯音的行为行为由行为确定的听阈。疲劳性刺激频率范围为4至11千赫，强度逐渐增加至相对于1微帕为179分贝，持续时间增加至55分钟。暴露频率不超过每周一次。测得的暂时性阈移平均为11分贝。阈测定至少需要20分钟。在暴露后360、180、90和45分钟检查恢复情况，45分钟内基本完全恢复。