Nachtigall Paul E, Supin Alexander Ya, Pacini Aude F, Kastelein Ronald A
Hawaii Institute of Marine Biology, University of Hawaii, Kaneohe Hawaii, USA.
Institute of Ecology and Evolution of the Russian Academy of Sciences, Moscow, Russia.
Integr Zool. 2018 Mar;13(2):160-165. doi: 10.1111/1749-4877.12286.
Hearing sensitivity change was investigated when a warning sound preceded a loud sound in the false killer whale (Pseudorca crassidens), the bottlenose dolphin (Tursiops truncatus), the beluga whale (Delphinaperus leucas) and the harbor porpoise (Phocoena phocoena). Hearing sensitivity was measured using pip-train test stimuli and auditory evoked potential recording. When the test/warning stimuli preceded a loud sound, hearing thresholds before the loud sound increased relative to the baseline by 13 to 17 dB. Experiments with multiple frequencies of exposure and shift provided evidence of different amounts of hearing change depending on frequency, indicating that the hearing sensation level changes were not likely due to a simple stapedial reflex.
研究了伪虎鲸（Pseudorca crassidens）、宽吻海豚（Tursiops truncatus）、白鲸（Delphinaperus leucas）和港湾鼠海豚（Phocoena phocoena）在响亮声音之前出现警示音时听觉敏感度的变化。使用短声串测试刺激和听觉诱发电位记录来测量听觉敏感度。当测试/警示刺激先于响亮声音出现时，响亮声音之前的听觉阈值相对于基线增加了13至17分贝。对多个暴露频率和偏移进行的实验提供了证据，表明听觉变化量因频率而异，这表明听觉感觉水平的变化不太可能是由于简单的镫骨肌反射所致。
