59
UNIT
1.5m
MICROPHONE
CEILING
PLA-RP5AA.UK
PLA-RP5AA
1
.UK
PLA-RP6AA.UK
PLA-RP6AA
1
.UK
NOTCH SPL(dB)
LINE
45
43
40
37
NOTCH
SPL(dB)
LINE
45
43
40
37
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)
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
High
Medium1
Medium2
Low
High
Medium1
Medium2
Low
OC297-E-2.qxp 05.5.6 5:34 PM Page 59
