Specifications

46
M(4)RT150A/AR NC CURVES
0
10
20
30
40
50
60
70
80
90
125 250 500 1000 2000 4000 8000
Octave-band frequency (Hz)
Sound pressure level (dB, ref 20µPa)
NC-20
NC-30
NC-25
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65
NC-70
M(4)RT 200A/AR NC CURVES
0
10
20
30
40
50
60
70
80
125 250 500 1000 2000 4000 8000
Octave-band frequency(Hz)
Sound pressure level (dB, ref 20µPa)
NC-20
NC-30
NC-25
NC-35
NC-40
NC-45
NC-50
NC-55
NC-60
NC-65