Mitsubishi Electric PLA-RP-BA Technical Data Book page 70

PLA-RP125BA
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
CEILING
MICROPHONE
NOTCH SPL(dB) LINE
High 41
Medium1 39
Medium2 36
Low 34
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
UNIT
1.5m
PLA-RP140BA
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
70
NOTCH SPL(dB) LINE
High 44
Medium1 42
Medium2 39
Low 36
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000