
62
0
10
20
30
40
50
60
70
80
125 250 500 1000 2000 4000 8000
Octave-band frequency (Hz)
-
NC-3
-
NC-4
NC-60
NC-55
NC-50
Sound pressure level (dB, ref 20µPa)
0
10
20
30
40
50
60
70
80
125 250 500 1000 2000 4000 8000
Octave-band frequency (Hz)
-
NC-3
-
-
NC-60
NC-55
NC-50
Sound pressure level (dB, ref 20µPa)
A5AC30CR NC CURVE
A5AC40CR NC CURVE
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