This standard specifies the determination methods for sound power level of noise on the reflection plane under the free-field conditions. Annex C (Normative Annex) presents the measuring methods for sound pressure level of noise. And Annex D (Normative Annex) presents the measuring methods for sound pressure level of noise emitted by air conditioners.
This standard is applicable to the refrigerating and air conditioning equipments/parts (hereinafter referred to as "units") assembled by facilities.
