Sound Pressure Level - Haier AB072MRERA Service Manual

14.8 Sound pressure level

(1) Testing illustrate:
Air outlet duct
Outlet side
(2) Testing condition:
a. Unit running in the standard condition
b. Test in the semi-anechoic chamber
c. Noise level varies from the actual factors such as room structure, etc.
(3) Octave band level:
Unit
Testing position just below the central of the unit
70
60
50
40
30
20
Limit of
audible
continuous
10
noise
63 125 250 500 1000 2000 4000 8000
Octave band center frequency (HZ)
344
Air return duct
Sound level meter
Air