The standard stipulates the standard value of noise around airport caused by the passing of aircraft. It adopts the weighted equivalent continued noise grade over one night as the evaluation value shown in Lwecpn with the unit of dB. The standard value of different applicable areas is: special residential area, residential area and area for culture and education purpose of use ≤70; living areas except for Grade I area ≤75. The standard is supplemented by related measurement method.

　Environment standard of aircraft noise around airport (GB 9660-88)