CK50 A/AR NC Cur ves
0
10
20
30
40
50
60
70
125 250 500 1000 2000 4000 8000
Octave-band f requency (Hz)
Sound pressure level (dB, ref 20 Pa)
NC-40
NC-35
NC-30
NC-25
NC-20
NC-45
NC-50
Hi g h f an
Lo w f an
Medium fan
M easured in anecho ic ro o m at 1.5m belo w the facia
17
