Sound Pressure Level - Haier AB072MRERA Service Manual

12.8 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.
AD052/072/92/122MJERA
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
NC-60
NC-50
NC-40
NC-30
NC-20
125 250 500 1000 2000 4000
AD182MJERA
NC-60
NC-50
NC-40
NC-30
NC-20
125 250 500 1000 2000 4000
Air return duct
Unit
Sound level meter
70
60
50
40
30
H
M
L
20
Limit of
audible
continuous
noise
10
8000 63 125
Octave band center frequency (HZ)
70
60
50
40
30
H
M
L
20
Limit of
audible
continuous
noise
10
8000 63 125
Octave band center frequency (HZ)
298
Air
AD162MJERA
NC-60
NC-50
NC-40
NC-30
H
NC-20
M
L
250 500 1000 2000 4000 8000
AD242/282MJERA
NC-60
NC-50
NC-40
NC-30
H
NC-20
M
L
250 500 1000 2000 4000 8000