SSS 2012-05-15
时间：2012-06-28 02:27:47
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（单词翻译）
Have you ever wanted to turn down the volume at a deafening1 concert or noisy bar? Envy the whale: a new study finds that toothed whales can reduce their own auditory sensitivity when they expect a loud sound. The work is presented at this week’s Acoustics2 2012 meeting.
Whales and dolphins rely on their responsive hearing to interpret returning echolocation clicks. Previous research suggested that these
marine3 mammals could dull their hearing before uttering outgoing echolocation clicks, which are very loud. Could they use the same coping
mechanism4 for external noises?
To find out, researchers trained a false
killer5 whale that a loud noise would always follow a brief warning signal. Then, they attached suction-cup
sensors6 to the outside of the whale’s head and played the signal. The sensors measured brainwaves that indicated the whale did reduce its hearing sensitivity in expectation of a clamor. The researchers hope to test other species as well.
Loud noises from ships can disturb whales. To accommodate marine life, perhaps
vessels7 could emit signals before making a ruckus, warning whales to
tune8 us out.
Thanks for the minute for Scientific Americans 60 second science, I am Sophie Bushwick
auditory:related to hearing
clamor:a loud continuous noise
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