49
M5CCWS020CR NC CURVE
0
10
20
30
40
50
60
70
125 250 500 1000 2000 4000 8000
Octave-band frequency (Hz)
Sound pressure level (dB,reference 20µPa)
NC-20
NC-35
NC-50
NC-25
NC-30
NC-45
NC-40
M
L
H
M5CCWS025CR NC CURVE
0
10
20
30
40
50
60
70
125 250 500 1000 2000 4000 8000
Octave-band frequency (Hz)
Sound pressure level (dB,reference 20µPa)
NC-20
NC-35
NC-50
NC-25
NC-30
NC-45
NC-40
M
L
H
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