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SSS 2011-01-26

时间:2011-02-11 06:48来源:互联网 提供网友:qi2261   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American's 60-Second Science. I'm Christopher Intagliata. Got a minute?

Living in the city, you can't escape traffic noise. But it's not just a nuisance. If you're over 65, the noise might be a risk to your health, too—by increasing your risk of a stroke. That's according to a study in the European Heart Journal.

The researchers studied over 51,000 Danish city dwellers1 for about a decade. And they mapped out noise levels at each person's home over time, using a noise calculating program. After accounting2 for other variables, like smoking history, diet and air pollution, they found that for the over-65 set, the risk of stroke rose 27 percent higher for every 10 decibels3 of noise exposure. The baseline was the volume of a normal conversation.

This study doesn't prove that road noise causes strokes. But previous studies have linked noise to heart attacks and higher blood pressure, too—possibly due to increased stress and sleep disturbance4. For older people who already have trouble sleeping, the researchers say that extra tossing and turning could be the cause. So don't just worry about the fumes5 if you're relocating to a busy city street—keep in mind your sound health, too.

Thanks for the minute. For Scientific American's 60-Second Science, I'm Christopher Intagliata.


点击收听单词发音收听单词发音  

1 dwellers e3f4717dcbd471afe8dae6a3121a3602     
n.居民,居住者( dweller的名词复数 )
参考例句:
  • City dwellers think country folk have provincial attitudes. 城里人以为乡下人思想迂腐。 来自《简明英汉词典》
  • They have transformed themselves into permanent city dwellers. 他们已成为永久的城市居民。 来自《简明英汉词典》
2 accounting nzSzsY     
n.会计,会计学,借贷对照表
参考例句:
  • A job fell vacant in the accounting department.财会部出现了一个空缺。
  • There's an accounting error in this entry.这笔账目里有差错。
3 decibels 05e497be99c28b77edff352bf9305209     
n.分贝( decibel的名词复数 )
参考例句:
  • The typical lawn mower makes about 90 decibels of noise. 典型的割草机发出的声响约为90分贝。 来自《简明英汉词典》
  • A normal conversation reaches 55 decibels. 普通的谈话即可达55分贝。 来自《简明英汉词典》
4 disturbance BsNxk     
n.动乱,骚动;打扰,干扰;(身心)失调
参考例句:
  • He is suffering an emotional disturbance.他的情绪受到了困扰。
  • You can work in here without any disturbance.在这儿你可不受任何干扰地工作。
5 fumes lsYz3Q     
n.(强烈而刺激的)气味,气体
参考例句:
  • The health of our children is being endangered by exhaust fumes. 我们孩子们的健康正受到排放出的废气的损害。
  • Exhaust fumes are bad for your health. 废气对健康有害。
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