National standard TCVN 8776:2011 – Acoustics – Measurement of sound pressure levels of equipment used in buildings – Engineering method

This standard specifies methods for measuring the sound pressure level of service equipment in buildings installed within building structures. This standard covers measurements of the characteristics of equipment using sanitary systems, mechanical ventilation, heating and cooling, lifts, rubbish chutes, boilers, blowers, pumps, and other auxiliary equipment, and doors of motor vehicle garages, but may also be applied to other equipment attached to or installed in buildings.

The method is suitable for rooms with a volume approximately equal to or less than 300 m3, such as residential buildings, hotels, schools, offices, and hospitals. This standard is not intended for measurements
in auditoriums and large concert halls. However, the operating conditions and operating cycles given in Annex B may be used in such cases.

The sound pressure level of service equipment in buildings is determined as the maximum A-weighted sound pressure level and the optional C-weighted sound pressure level occurring during the specified operating cycle of the service equipment in buildings under test, or the equivalent continuous sound pressure level determined with a specified integration time. A-weighted and C-weighted values are calculated from octave band measurements.