Mitsubishi Electric PCA-RP50GA Service Manual page 14

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
unit
ceiling
14