Mitsubishi PLA-A12BA Technical Data Book page 87

PLA-A36B A
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
NOTCH SPL(dB) LINE
High 40
Medium1 37
Medium2 34
Low 32
500 1000 2000 4000 8000
CEILING
PLA-A42BA
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
NC-20
CONTINUOUS
NOISE
10
63
5ft
MICROPHONE
NOTCH SPL(dB)
High
Medium1
Medium2
Low
125 250 500 1000 2000
BAND CENTER FREQUENCIES, Hz
UNIT
LINE
41
39
36
34
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
4000 8000
87