0
10
20
30
40
50
60
125 250 500 1000 2000 4000 8000
Octave-band frequency (Hz)
Sound pressure level (dB,ref 20µPa)
High Fan
NC-30
NC-35
NC-40
NC-45
Low Fan
Medium Fan
NC-25
NC-20
0
10
20
30
40
50
60
125 250 500 1000 2000 4000 8000
Octave-band frequency (Hz)
Sound pressure level (dB, ref 20µPa)
High Fan
Medium Fan
Low Fan
NC-20
NC-30
NC-45
NC-40
NC-25
NC-35
MWM 007 / 009 G/GR , M5WM 007 / 009 G/GR
NC CURVES
MWM 010 G/GR , M5WM 010 G/GR
NC CURVES
36
Measured in anechoic room at 1m in front and 0.8m below the vertical centre line of the unit
Measured in anechoic room at 1m in front and 0.8m below the vertical centre line of the unit