There are many nuisance phenomena, such as honking in no-honking zones, such as construction noise nuisance in violation of the night construction regulations, the square dance of the treble horn, the commercial area to play advertisements on the audio equipment, and the building of the air conditioning machine, ventilation pipe, pump room, elevator shafts and other indoor and outdoor mechanical equipment vibration noise. Daily life, we will be disturbed by the noise, but not all noise constitutes a nuisance, define the nuisance of three latitudes, one is the time period, two is the location, three is the decibel value, for example, you said that the school bell whether the surrounding neighborhood constitutes a nuisance, it depends on the surrounding architectural planning, one side of the school will not be next to the residential area, which is also to avoid noise disturbances as far as possible.