Have You ever gone to a concert and
realized that your seats were right next to the booming speakers? Are you guilty
{{U}} {{U}} 1 {{/U}} {{/U}}turning up the volume on your
portable cassette or CD player to drown out the whining (哭哭啼啼) of your little
brother? Sometimes it's difficult to avoid loud music or noises, but they can be
bad news because loud noises can {{U}} {{U}} 2 {{/U}}
{{/U}}temporary or permanent hearing loss. Extremely loud music
and noises that go on for long periods of {{U}} {{U}} 3 {{/U}}
{{/U}}are common causes of deafness. If a noise is so loud that you have to shout
to make yourself {{U}} {{U}} 4 {{/U}} {{/U}}, there is a
{{U}} {{U}} 5 {{/U}} {{/U}}that the mechanism inside your ear
can be injured Temporary hearing loss can happen after you've been {{U}}
{{U}} 6 {{/U}} {{/U}}to loud noise for only 15 minutes. If you have
temporary hearing loss. you won't be able to hear as {{U}} {{U}} 7
{{/U}} {{/U}}as you normally can, and you may have tinnitus (耳鸣), which is a
fancy word for ringing in the ears. Your ears call feel "full", too {{U}}
{{U}} 8 {{/U}} {{/U}}these things usually go away and your hearing
soon returns to normal. Permanent hearing loss can happen when,
someone is exposed to loud noise {{U}} {{U}} 9 {{/U}} {{/U}}and
over. Construction workers and people who work in factories must {{U}}
{{U}} 10 {{/U}} {{/U}}ear protectors because the equipment they use
can be extremely loud. But even some lawn mowers (割草机) and power tools can
permanently {{U}} {{U}} 11 {{/U}} {{/U}}a person's ability to
hear high-pitched noises and can also give him permanent tinnitus. Listening to
extremely loud music over and over call also have the same effect on a person's
{{U}} {{U}} 12 {{/U}} {{/U}}. And using headphones on a portable
cassette or CD player can be dangerous {{U}} {{U}} 13 {{/U}}
{{/U}}if the volume is too high and the headphones are used a lot, the noise can
damage the ears. The best way to avoid hearing loss is to wear
ear protectors when working with machinery and earplugs when going to a
{{U}} {{U}} 14 {{/U}} {{/U}}. Headphones are OK to wear when
you're listening to music; just be sure the volume isn't too high, and give them
a rest {{U}} {{U}} 15 {{/U}} {{/U}}once in a while.