Service Guide

11
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.
1.5M
Octave band sound pressure level dB Octave band sound pressure level dB
10
63 125
250 500
1000 2000 4000 8000
10
20 20
30 30
40 40
50 50
60 60
70 70
Octave band center frequency (Hz) Octave band center frequency (Hz)
MVAB009MV2AA MVAB012/018MV2AA
Limit of
audible
continuous
noise
Limit of
audible
continuous
noise
63
125
250
500
1000 2000 4000
8000