Mitsubishi Electric Mr. Slim PLA Series Service Manual page 14

PLA-A36BA6
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
OCH581
NOTCH SPL(dB) LINE
High 40
Medium1 37
Medium2 34
Low 32
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
CEILING
MICROPHONE
PLA-A42BA6
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125
UNIT
5ft
NOTCH SPL(dB)
High 41
Medium1 39
Medium2 36
Low 34
250 500 1000 2000 4000
BAND CENTER FREQUENCIES, Hz
LINE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
8000