Test Method/ Standard
ISO 16283-3
ISO 140-5
GB/T 19889.5

Test Facility
A four storey building

Instrumentation
B&K Class 0 or 1 type Sound Level Analyzer
B&K microphone
B&K calibrator
B&K omnidirectional loudspeaker
50metre sound source
Anemometer

Test Description
Set up the 50m long sound source and measure the sound pressure level (dB) simultaneously at the receiver room and outside of the test specimen to get the sound pressure difference.