Doyouoftenlistentomusicatloudvolumes(音量)?Youshouldknowt...

問題詳情：

Do you often listen to music at loud volumes (音量)? You should know that this habit is bad for your hearing. Over 1 billion young people are at risk of hearing loss (聽力喪失) ,because of listening to loud noise for long periods of time. Listening to music or watching a TV show at loud volumes can harm your hearing.

The United Nations has standards for safe listening. It is not safe to listen to sounds that are louder than 85 dB (分貝) for eight hours or 100 dB for 15 minutes. The sound of a busy road is about 85 dB and the sound of a rock concert can be about 100 dB.

Loud noise is harmful to the inner ear. Most of us are bon with about 16,000 hair cells (聽毛細胞) in our inner ears. These cells notice sounds. However, listening to loud noise for a long time can make these cells work too hard and cause some of them to die. This is what causes hearing loss. Once this happens, it's hard to get your hearing back.

Some people might think that their music isn't all that loud. But this can depend on where you are. For example, if you are in a noisy place like the subway, you might turn up your music too loud without realizing it. Later, when you listen to it at the same volume in a quiet place, you alight feel uncomfortable

The "safe level" for most sound is below 80 dB for up to 40 hours a week. A level of 80 dB is about equal to (相當於) the noise of a subway.

Here is some advice on safe listening. Over-the-ear headphones  (頭戴式耳機) are better than in-ear ones. They do a better job of stopping outside noise, so you can listen at a lower volume. Don't listen to loud music on your headphones for a long time. Follow the 60:60 rule: listen to music at 60 percent of your headphones' maximum volume for no more than 60 minutes a day.

根據短文內容，判斷下列句子正誤。正確的用“A”表示，不正確的用“B”表示。

16. It is safe to listen to sounds that are louder than 100 dB for 15 minutes

17. Listening to loud noise for a long time can cause some hair cells in the inner ear to die.

18. From the fourth paragraph, we know people don't always realize how loud their music is.

19. In-ear headphones are better than over-the-eat ones because they can stop more outside noise.

20. This article mainly tells us why ears are an important part of our bodies.

【回答】

16.B

【解析】根據第一段t is not safe to listen to sounds that are louder than 85 dB (分貝) for eight hours or 100 dB for 15 minutes. 聽8小時大於85分貝（分貝）或15分鐘大於100分貝的聲音是不安全的。所以此句和原文是矛盾的，故用B表示。

17.A

【解析】根據第二段However, listening to loud noise for a long time can make these cells work too hard and cause some of them to die. 然而，長時間聽大噪音會使這些細胞工作得太*苦，導致其中一些細胞死亡。所以此句和原文是一致的，故用A表示。

18.A

【解析】根據第四段For example, if you are in a noisy place like the subway, you might turn up your music too loud without realizing it. 比如當你在地鐵的時候，你可能會把你的音樂調得太大而沒有意識到。所以當人們在比較嘈雜的環境時，可能不能意識到音樂的聲音有多大，故此題說法和原文一致，故用A表示。

19.B

【解析】根據原文Over-the-ear headphones (頭戴式耳機) are better than in-ear ones. They do a better job of stopping outside noise,可知頭戴式耳麥比耳麥好，它們在阻止外界噪音方面做得更好。故此句說法和原文是相反的，故用B表示。

20.B

【解析】通過閱讀全文可知，本文主要講了長時間聽大音量的音樂會對聽力造成傷害，而並沒有講為什麼耳朵是我們身體的重要組成部分，此選項錯誤，故用B表示。

知識點：健康保健類

題型：閱讀理解