99
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
PSA-RP71KA
NOTCH
High
Middle
Low
SPL(dB)
44
42
40
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 ( 0dB = 0.0002
μ
bar )
BAND CENTER FREQUENCIES, Hz
PSA-RP100KA
NOTCH
High
Middle
Low
SPL(dB)
50
49
45
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 ( 0dB = 0.0002
μ
bar )
BAND CENTER FREQUENCIES, Hz
PSA-RP125KA
NOTCH
High
Middle
Low
SPL(dB)
51
49
45
LINE
NOISE CRITERION CURVES
5
1m
1m
unit
about 1.4m
MICROPHONE
floor
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
PSA-RP140KA
NOTCH
High
Middle
Low
SPL(dB)
51
49
45
LINE
OCH528
