Mitsubishi Electric PLA-RP-BA Technical Data Book page 82

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
45
High
43
Medium1
40
Medium2
37
Low
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
CEILING
PLA-RP140AA2
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
1.5m
MICROPHONE
82
NOTCH SPL(dB)
45
High
43
Medium1
40
Medium2
37
Low
500 1000 2000 4000
UNIT
LINE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
8000