In the international standard classification, GB 6882 involves: Acoustics and acoustic measurements.
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, GB 6882
GB/T 6882-2016 Acoustics.Determination of sound power levels and sound energy levels of noise sources using sound pressure.Precision methods for anechoic rooms and hemi-anechoic rooms
GB/T 6882-1986 Acoustics--Determination of sound power levels of noise sources--Precision methods for anechoic and semi-anechoic rooms
GB/T 6882-2008 Acoustics.Determination of sound power levels of noise sources using pressure.Precision methods for anechoic and hemi-anechoic rooms