Sound Data
70
60
50
40
30
20
10
0
125
Measured in anechoic room at 1.5m below the centre of the unit
Tested with 2m length duct at the air discharge outlet and air return inlet
70
60
50
40
30
20
10
0
125
Measured in anechoic room at 1.5m below the centre of the unit
Tested with 2m length duct at the air discharge outlet and air return inlet
21
FD(Y)M28CXV1
250
500
Octave-band frequency (Hz)
FD(Y)M30CXV1
250
500
Octave-band frequency (Hz)
SH
H
M
L
1000
2000
SH
H
M
L
1000
2000
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
4000
8000
NC-50
NC-45
NC-40
NC-35
NC-30
NC-25
NC-20
4000
8000