10
6
NOISE CRITERION CURVES
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(0dB=0.0002
μ
bar)
BAND CENTER FREQUENCIES, Hz
PKA-RP50FAL2
PKA-RP50FAL2#1
PKA-RP60/71FAL
PKA-RP60/71FAL#1
PKH-P60/71FALH
High
Low
45
SPL(dB)
39
LINE
NOTCH
UNIT
WALL
1m
1m
MICROPHONE
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(0dB=0.0002
μ
bar)
BAND CENTER FREQUENCIES, Hz
PKA-RP100FAL
PKA-RP100FAL#1
PKH-P100FALH
High
NOTCH
Low
46
SPL(dB)
41
LINE
