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噪声是人们不需要的声音。声音是一种能量,即声能。声音的大小用分贝(dB)来度量。分贝是级的单位,它是个相对量。为便于仪器的直接读数,国内常用声压级,测点与声源的距离不同,声源所处的环境不同,声压级值也不同,这一点务必注意。噪声超过一定的量级对人体是有害的,长期在较强烈的噪声环境中工作,会引起多种疾
Noise is the voice people do not need. Sound is an energy, that is, sound energy. The size of the sound is measured in decibels (dB). Decibel is a unit of level, it is a relative amount. In order to facilitate the direct reading of the instrument, the commonly used sound pressure level in the country, the distance between the measuring point and the sound source is different, the sound source is in a different environment, and the sound pressure level value is also different. Noise over the order of magnitude harmful to the human body, long-term work in a more intense noise environment, can cause a variety of diseases