People live with noises all their lives. A place may seem quiet at first,but sound soon come through. During a quiet night at home,(1)_____________________. Nature's noises usually bother us less than people's noises. Even in a natural quiet spot one hears birds or animal noises or perhaps the wind. Weather is sometimes very noisy.Noise is everywhere. (2)_________________. If you live near a free way,you know that mad noise of vehicles can travel from eight to ten miles. Ways in which people can escape unwanted noise include soundproofing,substitution and selective listening. Curtains,for example,can soften noises in a home. (3)___________________. Selective listening can provide escape from noise. When a person does something attentively,the sound seems to disappear. A train that passes on a regular schedule may hardly be noticed after its first noisy journey. It is fortunate that people have ways to reduce the effects of noise although noise will probably not decrease.
本帖隐藏的内容需要回复才可以浏览
作者: longyuan 时间: 2014-2-25 13:42
You may hear the noise of refrigerator motor or the heating system
Noise can travel a long distance
Music can cover up a list noise by one sond and another
