Sound Level - Airwell VVFA Series Service Manual

8. Sound Level

(1) Testing illustration
2) Testing condition:
a. Unit running in the nominal 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)
VVFA-125R-01M22
NC-60
NC-50
NC-40
NC-30
NC-20
125 250 500 1000 2000 4000 8000
VVFA-150R-01M22
VVFA-150R-01T32
NC-60
NC-50
NC-40
NC-30
NC-20
125 250 500 1000 2000 4000 8000
1.18m
1.18m
1m 1m
H
H
15