34
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
PUMY-71VM
PUMY-71VM1
PUMY-71VM2
Hi 52
SPL(dB) LINE
NOTCH
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
PUMY-125VM
PUMY-125VM
1
PUMY-125VM2
PUMY-125YM
PUMY-125YM
1
PUMY-125VMA
PUMY-125VMA
1
PUMY-125YMA
Hi 54
SPL(dB) LINE
NOTCH
1m
1m
MICROPHONE
OC183E--2.qxp 10.5.6 0:46 PM Page 34