Mitsubishi Electric PLA-RP-BA Technical Data Manual page 114

PLA-RP125AA2
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
NOTCH SPL(dB) LINE
High 45
Medium1 43
40
Medium2
Low 37
500 1000 2000 4000 8000
CEILING
PLA-RP140AA2
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
NC-20
CONTINUOUS
NOISE
10
63
1.5m
MICROPHONE
114
NOTCH SPL(dB)
High
Medium1
Medium2
Low
125 250 500 1000 2000
BAND CENTER FREQUENCIES, Hz
UNIT
LINE
45
43
40
37
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
4000 8000