From the physiological point of view, all the noise that interferes with people's rest, study and work, as well as the sound you want to hear, that is, unnecessary sound, is collectively called noise. When the noise has a bad effect on people and the surrounding environment, it will form noise pollution.
Since the industrial revolution, the creation and use of various machinery and equipment have brought prosperity and progress to mankind, but at the same time, more and more noise has been produced. Noise can not only cause hearing damage, but also induce a variety of carcinogenic and fatal diseases, but also interfere with people's life and work.
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