15
15
1m
1m
unit
about 1.4m
MICROPHONE
ceiling
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
AVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
PCA-RP125KAQ
PCA-RP125KAQR2
PCA-RP125KAQR2-ER
NOTCH
High
Medium1
Medium2
Low
SPL(dB)
45
43
41
39
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
AVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
PCA-RP140KAQ
PCA-RP140KAQR2
PCA-RP140KAQR2-ER
NOTCH
High
Medium1
Medium2
Low
SPL(dB)
48
45
43
41
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
AVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
PCA-RP100KAQ
PCA-RP100KAQR2
PCA-RP100KAQR2-ER
NOTCH
High
Medium1
Medium2
Low
SPL(dB)
43
41
39
37
LINE
OCH491D
