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    Noise Noise testing

    With the development of modern industry, environmental pollution also came into being, noise pollution Is a kind of environmental pollution, has become a great harm to human beings. Noise pollution, water pollution, air pollution and solid waste pollution are regarded as four major environmental problems in the world. Physically, noise is the sound produced when the sound source vibrates irregularly; from the perspective of environmental protection, all the sounds that affect people's normal study, life and rest are called Noise

     Noise and vibration detection

    Sources of noise

    (1) traffic noise: including noise from motor vehicles, ships, subways, trains, airplanes, etc. With the rapid increase of the number of motor vehicles, traffic noise has become the main source of urban noise.

    (2) industrial noise: noise produced by various equipment in the factory. Generally, the sound level of industrial noise is relatively high, which brings great shadow noise pollution to workers and surrounding residents.

    (3) construction noise: mainly from the noise of construction machinery. The characteristic of building noise is high intensity, and it often occurs in densely populated areas, so it seriously affects the rest and life of residents.

    (4) social noise: including the noise from people's social activities, household appliances and audio equipment. Although the noise level of these equipment is not high, but because of the close relationship with people's daily life, people can not get quiet when they are resting, which is particularly troublesome, and can easily cause neighborhood disputes.

    (5) Noise pollution of family life, etc

    Serial number Test items Name and number of test standard (method)
    one ambient noise Environmental quality standard for noise (GB 3096-2008)
    two Boundary noise Emission standard of noise at boundary of industrial enterprises GB 12348-2008
    three Construction site noise Measurement method of noise at boundary of construction site GB / T 12524-1990
    four Aircraft noise around the airport Measurement method of aircraft noise around airport GB / T 9661-1988
    five Railway boundary noise Noise limits and measurement methods for railway boundary GB 12525-1990
    six Workplace noise Measurement of physical factors in the Workplace Part 8: noise GBZ / T 189.8-2007
    seven Social living environment noise Noise emission standard for social living environment GB 22337-2008
    eight Environmental vibration in urban area Measurement method of environmental vibration in urban area GB / T 10071-1988
    nine Railway environmental vibration

    Railway environmental vibration method TB / T 3152-2007

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