笪景行

Experts say that more than 1 billion young people cannot hear well.

They are between 12 and 34 years old. Young people often hear a loudcontinuous noise in their ears. Their hearing tests look normal. Later， their hearingtest results are worse.

Experts know reasons why this situation happens. Young people listen to theirheadphones. They also go to concerts. The music is too loud. Sometimes， music inrestaurants is loud， too.

Decibels1 tell us how loud something is. The sound of a food mixer is 85decibels. The sound of a train is 100 decibels. Experts say that it is safe to listen to85 decibels at work.

Sometimes we can lose hearing when we hear something very loud only once.Loud noise kills the cells2 in our ears. We cannot fix the situation.

專家表示，超過10 億年輕人聽力不好。

他們年齡在12 到34 歲之間。年輕人耳朵里經(jīng)常聽到連續(xù)不斷的巨響。他們的聽力測試看起來正常。后來，他們的聽力測試結(jié)果變差了。

專家們知道這種情況發(fā)生的原因。年輕人用耳機(jī)聽音樂，他們也去聽音樂會。音樂太吵了。有時，餐館里的音樂也很吵。

分貝告訴我們聲音有多大。食物攪拌器的聲音是85 分貝。火車的聲音是100 分貝。專家表示，工作時聽到85 分貝（的聲音）是安全的。

有時，我們只聽到一次非常響亮的聲音也可能會失去聽力。巨大的噪音殺死了我們耳朵里的細(xì)胞。我們無法解決這個問題。

（英語原文選自院newsinlevels.com）