Sound Pressure Level - Haier AB072MRERA Service Manual

21.8 Sound pressure level

1) Testing illustrate:
2) Testing condition:
a: Unit running in the normal condition
b: Test in the semi-anechoic chamber
c: Noise level varies from the actual factors such as room structure, etc.
3) Sound curves:
AS05-122MF/NERA
70
NC-60
60
NC-50
50
NC-40
40
NC-30
30
NC-20
20
Limit of
audible
continuous
noise
10
63 63 63 63 63 63 63 63 125 250 500 1000
Octave band center frequency (Hz)
1m
AS16-242MF/NERA
70
60
50
40
30
H
20
Limit of
audible
continuous
M
noise
L 10
63 63 63 63 63 63 63 63 125
2000 4000 8000
Octave band center frequency (Hz)
0.8m
NC-60
NC-50
NC-40
NC-30
NC-20
H
M
L
250 500 1000 2000 4000 8000
532
AS28-302MNERA
70
NC-60
60
NC-50
50
NC-40
40
NC-30
30
NC-20
20
Limit of
audible
continuous
noise
10
63 63 63 63 63 63 63 63 125 250 500 1000 2000
Octave band center frequency (Hz)
H
M
L
4000 8000