1, the noise standard range of how much normal: a living area night test 50 decibels or more, the second living area night test 65 decibels or more, as long as more than 22:00 at night or to 6:00 in the morning of the next day is a nuisance, belong to the noise pollution. If the place where the behavior in these categories is a nuisance.
2, the national "urban area noise standards", clearly stipulated in the city of five types of areas of the maximum limit of environmental noise: First, to the residential, cultural and educational institutions in the area, daytime 55dB, 45dB at night. two, residential, commercial, industrial mixed area, daytime 60dB, nighttime 50dB. three, the industrial area, daytime 65dB, nighttime 55dB. four, the city in the Road traffic arterial roads, inland waterways, railroads on both sides of the main trunk line area, daytime 70dB, nighttime 55dB.