Airwell YCV280, Installation And Maintenance Instructions Manual

Page: 177 / 412

(1) Testing illustrate:
(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.
(3) Octave band level
AS072-162MGERA
O
c
t
av
e b
and
s
o
und
pr
e
s
s
ur
e
dB
Octave band center frequency
（
HZ
）
80004000 20001000 500250 12563
70
60
50
40
30
20
10
NC-60
NC-50
NC-40
NC-30
NC-20
limit of audible
continuous
noise
M
H
L
您正在使用
ZWCAD 2008i 试用版
详情请查阅WWW.ZWCAD.COM
10
20
30
40
50
60
70
63 125 250 500 1000 2000 4000 8000
Octave band center frequency (Hz)
Octave band sound pressure dB
AS182/242MGERA
NC-60
NC-50
NC-40
NC-30
NC-20
limit of audible
continuous
noise
L
H
M
O
ct
av
e b
and
s
o
und
pr
e
ss
ur
e
dB
Octave band center frequency
（
HZ
）
8000 4000 2000 1000 500 250 125 63
70
60
50
40
30
20
10
NC-60
NC-50
NC-40
NC-30
NC-20
limit of audible
continuous
noise
M
H
L
您正在使用
ZWCAD 2008i 试用版
详情请查阅WWW.ZWCAD.COM
10
20
30
40
50
60
70
63 125 250 500 1000 2000 4000 8000
Octave band center frequency (Hz)
Octave band sound pressure dB
NC-60
NC-50
NC-40
NC-30
NC-20
limit of audible
continuous
noise
L
H
M
Noise level 7.
HAV007~ 16
HAV018~ 24
177