Acson international A5DB-H Series, Technical Manual, Page: 24 / 94

22
0
10
20
30
40
50
60
70
125 250 500 1000 2000 4000 8000
A5DB450H3
Octave-band frequency (Hz)
Sound pressure level (dB, ref 20
μPa)
NC-20
NC-30
NC-25
NC-35
NC-40
NC-45
NC-50
NC-55
H
0
10
20
30
40
50
60
70
125 250 500 1000 2000 4000 8000
A5DB500H4
Octave-band frequency (Hz)
Sound pressure level (dB, ref 20
μPa)
NC-20
NC-30
NC-25
NC-35
NC-40
NC-45
NC-50
NC-55
H