Mitsubishi Electric PLA-RP-AA Technical Data Book page 99

PCA-RP140GA
PCH-P140GAH
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
1m
1m
about 1.4m
MICROPHONE
NOTCH SPL(dB) LINE
High 48
Medium1
46
Medium2 44
Low 42
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
ceiling
unit
99