英语翻译If you live in a large city,you are quite familiar with

英语翻译
If you live in a large city,you are quite familiar with some of the problems of noise,but,beause of some of its harmful effects,you may not be aware of the extent of its influence on human behavior.In recent years there has been a great deal of interest in the effects of noise on human behavior,and concepts such as "noise pollution" have arisen.Exposure to loud noises can definitely produce a partial or complete loss of hearing,depending on the intensity,duration,and frequency composition of the noise.many jobs present noise hazards,such as working in factories and around jet aircraft,driving farm tractors,and working(or sitting) in music halls where rock bands are playing.In general,continuous exposure to sounds of over 80 decibels can be considered dangerous.If exposure is for a sufficient period of time,it may produce significant hearing loss.Noise can have unexpected harmful effects on performance of certain kinds of tasks,for instance,if one is performing a watch keeping wask that requires vigilance,in which he is responsible for detecting weak signals of some kind.Communicating with other people os unfavorably affected by noise.If you have ridden in the rear of a jet transport,you may have noticed that it was difficult to carry an a conversation at first,and that,eventually,you adjusted the loudness of your speech to compensate for the effect.The problem is noise.