SSS 2012-05-15
时间：2019-01-08 作者：英语课 分类：Scientific American(五)月
英语课
Have you ever wanted to turn down the volume at a deafening 1 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 Acoustics 2 2012 meeting.
Whales and dolphins rely on their responsive hearing to interpret returning echolocation clicks. Previous research suggested that these marine 3 mammals could dull their hearing before uttering outgoing echolocation clicks, which are very loud. Could they use the same coping mechanism 4 for external noises?
To find out, researchers trained a false killer 5 whale that a loud noise would always follow a brief warning signal. Then, they attached suction-cup sensors 6 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 vessels 7 could emit signals before making a ruckus, warning whales to tune 8 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
n.声学，(复)音响效果，音响装置
- The acoustics of the new concert hall are excellent.这座新音乐厅的音响效果极好。
- The auditorium has comfortable seating and modern acoustics.礼堂里有舒适的座椅和现代化的音响设备。
adj.海的；海生的；航海的；海事的；n.水兵
- Marine creatures are those which live in the sea. 海洋生物是生存在海里的生物。
- When the war broke out,he volunteered for the Marine Corps.战争爆发时，他自愿参加了海军陆战队。
n.机械装置；机构，结构
- The bones and muscles are parts of the mechanism of the body.骨骼和肌肉是人体的组成部件。
- The mechanism of the machine is very complicated.这台机器的结构是非常复杂的。
n.杀人者，杀人犯，杀手，屠杀者
- Heart attacks have become Britain's No.1 killer disease.心脏病已成为英国的头号致命疾病。
- The bulk of the evidence points to him as her killer.大量证据证明是他杀死她的。
n.传感器，灵敏元件( sensor的名词复数 )
- There were more than 2000 sensors here. 这里装有两千多个灵敏元件。 来自《简明英汉词典》
- Significant changes have been noted where sensors were exposed to trichloride. 当传感器暴露在三氯化物中时，有很大变化。 来自辞典例句
n.血管( vessel的名词复数 )；船；容器；（具有特殊品质或接受特殊品质的）人
- The river is navigable by vessels of up to 90 tons. 90 吨以下的船只可以从这条河通过。 来自《简明英汉词典》
- All modern vessels of any size are fitted with radar installations. 所有现代化船只都有雷达装置。 来自《现代汉英综合大词典》