100
UNIT
1.5m
MICROPHONE
CEILING
PLA-RP35AA
PLA-RP50AA
PLA-RP60AA
NOTCH SPL(dB)
LINE
High
Medium1
Medium2
Low
High
Medium1
Medium2
Low
31
29
28
27
NOTCH
SPL(dB)
LINE
33
31
29
28
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
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
OCT
A
VE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 bar)
OCT
A
VE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 bar)
PLA-RP71AA
NOTCH SPL(dB)
LINE
34
32
30
28
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
High
Medium1
Medium2
Low
OCT
A
VE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 bar)