Mitsubishi Electric PLA-RP-AA Technical Data Book page 100

PCA-RP71HA
90
80
70
60
50
40
30
APPROXIMATE
20
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
1m
1m
about 1.4m
MICROPHONE
NOTCH SPL(dB) LINE
High 38
Low
34
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
PCA-RP125HA
90
80
70
60
50
40
30
APPROXIMATE
20
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63
ceiling
unit
100
NOTCH
High
Low
125 250 500 1000 2000
BAND CENTER FREQUENCIES, Hz
SPL(dB) LINE
50
44
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
4000 8000