Legal analysis: The standard of noise is not more than 55 decibels during the day and not more than 45 decibels at night. Decibel is the size of the unit of sound pressure level (symbol: db), the sound pressure doubles every time, the sound pressure level increased by 6 decibels. 1 decibel is the human ear just can hear the sound, 20 decibels below the sound, generally speaking, is quiet, 15 decibels below can be considered it belongs to the dead silence, 20-40 decibels is a couple of murmuring in the ears of the 40-60 decibels belongs to the normal sound of conversation, 60 decibels above belongs to the noisy!
Legal basis: "The Chinese People's **** and the State Environmental Noise Pollution Prevention and Control Law" Article 2 The environmental noise referred to in this law, refers to the industrial production, construction, transportation and social life in the interference with the surrounding living environment. The environmental noise pollution referred to in this law refers to the environmental noise generated by more than the state environmental noise emission standards, and interfere with the normal life of others, work and study phenomenon.