PLA-ZP125EA.UK
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63
125
250
500
BAND CENTER FREQUENCIES, Hz
CEILING
MICROPHONE
OCH625
NOTCH SPL(dB)
LINE
High
41
Medium1
39
Medium2
36
Low
33
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000
2000
4000
8000
UNIT
1.5m
13
13
PLA-ZP140EA.UK
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63
125
250
500
BAND CENTER FREQUENCIES, Hz
NOTCH SPL(dB)
LINE
High
44
Medium1
42
Medium2
39
Low
36
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
1000
2000
4000
8000