Life gets noisier every day and very f   people can be free from noise of some kind or another. W   you live in the centre of a modern city or a village far away, the chances that you will be disturbed by planes, cars, radios are almost everywhere. We seem to be used to noise, too. Some people feel quite lonely w   background music while they are working.
Tests have s    that total silence can be very frightening experiences. However, some people enjoy listening to pop music which is very l  , and this can do harm to their ears. The noise level in some places is far above the usual s   level for heavy industrial（工业） areas.
One recent report about noise said that a    a lot of people say that any noise disturbs their attention, only a sudden c     in the level of noise really affects people’s attention. It goes on to say that a background noise, which doesn’t change too much, may even help people to pay attention.
People are testing w    to make less noise. There are even laws controlling noise. We can’t r    to the “good old days” of peace and quiet, but we can make less noise if we shout loudly enough about it.