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托福听力段子：生活中的噪音影响

2016-05-31 15:09:55来源：网络

　　托福听力怎么练？新东方在线托福网带来托福听力段子：生活中的噪音影响：生活段子噪音影响，希望对考生托福听力备考有所帮助！更多托福备考资料请查看新东方在线托福网更多精彩内容。

　　I’m grad to see so many of you here. We’ve become really alarmed over the health center by the number of students we are seeing, who are experiencing hearing loss. First, I want to go over some basic about hearing. Then we can take a look at our school environment and see if we can figure out some ways to protect hearing. The leading cause of preventable hearing loss is excessive noise. Too much moderate noise for a long time or some types of intense noise for even a short time can damage hearing. Loudness is measured in units called decibels. One decibel is the lowest sound that the average person can here. Sounds up to 80 decibels generally aren’t harmful. That’s noise like traffic on a busy street. But anything louder than 80 decibels, especially with continuous exposure, may eventually hurt your hearing. Once you are up to around 140 decibels, that’s like a jet plane taking off, then you might even feel pain in your ears. And pains are sure sign that your hearing’s at risk. Even one exposure to a really loud noise at close range can cause hearing loss. So what you need to do is limit your exposure to harmful levels. If you pass along this handout, we can take a look at the decibel level of some common campus sounds. Notice how loud those horns are that people take to football games. They are really dangerous if blown right behind you. Now, let’s try to generate a list of damaging noises.

　　以上就是新东方在线托福网整理发布的托福听力段子：生活中的噪音影响。更多关于托福听力技巧、托福听力真题、托福听力资料下载的内容，敬请关注新东方在线托福网其他精彩内容！

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