How many decibels does the community noise exceed at night to disturb others' normal rest?

45 decibels, more than 45 will disturb the people.

(1) The pitch and intensity change confusedly, and the sound is not harmonious. It is produced by the irregular vibration of the vocal body (different from music). From the point of view of physics, noise is the sound produced when the vocal body vibrates irregularly.

(2) Homophones: sounds that should not exist in an environment. Generally refers to noisy and harsh sounds. From the perspective of environmental protection, all sounds that interfere with people's normal rest, study and work, and those that interfere with people's listening are noise.

Noise is a kind of sound that causes people to be agitated or loud and is harmful to human health. Noise pollution mainly comes from social noise such as traffic, vehicle horn, industrial noise, building construction, concert hall, tweeter, morning market and people talking loudly.