Sound Pressure Level - Haier AB072MRERA Service Manual

15.8 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.
70
60
50
40
30
20
Limit of
audible
continuous
noise
10
63
Octave band center frequency (HZ)
70
60
50
40
30
20
Limit of
audible
continuous
noise
10
63
Octave band center frequency (HZ)
Testing position just below the central of the unit
AD072-092MQERA
NC-60
NC-50
NC-40
NC-30
NC-20
125 250 500 1000 2000 4000
AD242MQERA
NC-60
NC-50
NC-40
NC-30
NC-20
125 250 500 1000 2000 4000
Air return duct
Unit
Sound level meter
AD122-182MQERA
70
60
50
40
30
H
M
L
20
Limit of
audible
continuous
noise
10
8000 63 125 250
Octave band center frequency (HZ)
AD282-302MQERA
70
60
50
40
H 30
M
L
20
Limit of
audible
continuous
noise
10
8000 63 125 250
Octave band center frequency (HZ)
381
Air
NC-60
NC-50
NC-40
NC-30
H
NC-20
M
L
500 1000 2000 4000 8000
NC-60
NC-50
NC-40
NC-30
H
NC-20
M
L
500 1000 2000 4000 8000