Heating ventilation and air conditioning equipment noiseThe determination of sound power level
Reference standard：
GB 3102.7 acoustic quantities and units
GB 3241 sound and vibration analysis with 1/1 and 1/3 octave filter
GB 3785 sound level meter of electric, acoustic performance and test methods
GB 3947 acoustic nomenclature
JJG 176 sound pressure level calibrator for verification regulations
JJG 188 sound level meter for verification procedures
JJG 277 standard source verification procedures