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一般说来,声音分为两类:一类是乐音,由物体呈周期性、有规律的振动而发出来的声音,它给人以和谐、舒适之感;另一类是噪声,物体无周期、无规则的振动,其声音使人心烦意乱,毫无快感。 噪声的来源很多,大致可分为生产性噪声,如各种动力机械转动的声音;交通性噪声,如各种机动车辆行驶时的声音;生活性噪声,如公共场所的喧哗声和家用电器产生的噪声等。 随着生产建设的发展,机械化生产规模不断扩大,噪声污染及其对人体的危害日益严重,进一步认识噪声及其控制非常
In general, the sound is divided into two categories: one is the sound, the object is cyclical, regular vibration and the sound emitted, it gives a sense of harmony and comfort; the other is noise, the object has no period , No rules of vibration, the sound annoying people, no pleasure. There are many sources of noise, which can be broadly divided into productive noises, such as the sound of various powered machines rotating; traffic noise, such as the sound of various motor vehicles; living noises, such as noise in public places and household appliances Noise and so on. With the development of production and construction, the scale of mechanized production is constantly expanding, the noise pollution and its harm to the human body are becoming increasingly serious, the noise and its control are further recognized