10
NOISE CRITERION CURVES
5
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
PCA-RP50GA
PCA-RP50GA#1
PCH-P50GAH
NOTCH
High
Medium1
Medium2
Low
SPL(dB)
40
37
34
32
LINE
NOTCH
High
Medium1
Medium2
Low
SPL(dB)
40
37
35
33
LINE
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
OCT
A
VE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002
μ
bar)
PCA-RP100GA
PCA-RP100GA#1
PCH-P100GAH
NOTCH
High
Medium1
Medium2
Low
SPL(dB)
41
39
37
35
LINE
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
μ
bar)
PCA-RP125GA
PCA-RP125GA#1
PCH-P125GAH
NOTCH
High
Medium1
Medium2
Low
SPL(dB)
43
41
39
37
LINE
PCA-RP50KAQ
PCA-RP60KAQ
PCA-RP71KAQ
PCA-RP100KAQ
