Mitsubishi Electric PLA-A·BA4 Technical Data Manual page 88

PKA-A12HA4
PKA-A18HA4
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
UNIT
3.3ft
3.3ft
MICROPHONE
88
NOTCH SPL(dB) LINE
High 43
Low 36
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
WALL
PKA-A24KA4
PKA-A30KA4
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
PKA-A36KA4
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 45
Low
39
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
SPL(dB) LINE
NOTCH
High 49
Low
43
500 1000 2000 4000 8000
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20