Noise Criterion Curves - Mitsubishi Electric Mr. Slim PKA-A24KA4 Service Manual

5

NOISE CRITERION CURVES

PKA-A24KA4.TH
PKA-A24KA
PKA-A30KA4.TH
PKA-A30KA
PKA-A24KAL
PKA-A30KAL
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
UNIT
3.3ft
MICROPHONE
PKA-A36KA4.TH
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125
WALL
3.3ft
8
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