74
PLA-RP125BA
PLA-RP125BA2
NOTCH SPL(dB)
LINE
High
41
Medium1
39
Medium2
36
Low
34
OCT
A
VE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002
μ
bar)
PLA-RP140BA2
NOTCH SPL(dB)
LINE
High
44
Medium1
42
Medium2
39
Low
36
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
OCT
A
VE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002
μ
bar)
BAND CENTER FREQUENCIES, Hz
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
BAND CENTER FREQUENCIES, Hz
UNIT
1.5m
MICROPHONE
CEILING