Noise Criterion Curves - Mitsubishi Electric PKA-A24KA8 Service Manual

5

NOISE CRITERION CURVES

PKA-A24KA8
PKA-A24KA
PKA-A30KA8
PKA-A30KA
PKA-A24KAL
PKA-A30KAL
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
TCH115A
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
MAIN UNIT
3.3 ft
MICROPHONE
PKA-A36KA8
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125
WALL
3.3 ft
7
SPL(dB)
NOTCH
High 49
Low 43
250 500 1000 2000 4000
BAND CENTER FREQUENCIES, Hz
LINE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
8000