Mitsubishi Electric PLA-RP-AA Technical Data Book page 107

PKA-RP35GAL
PKA-RP50GAL
90
80
70
60
50
40
30
APPROXIMATE
20
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
1m
MICROPHONE
NOTCH SPL(dB) LINE
High 43
Medium1 41
Medium2 38
Low 36
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
UNIT
WALL
1m
107