Mitsubishi Electric PKA-RP100FAL#1 Service Manual Page 10

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6 NOISE CRITERION CURVES
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB(0dB=0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
PKA-RP50FAL2
PKA-RP50FAL2#1
PKA-RP60/71FAL
PKA-RP60/71FAL#1
PKH-P60/71FALH
High
Low
45
SPL(dB)
39
LINE
NOTCH
UNIT
WALL
1m
1m
MICROPHONE
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB(0dB=0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
PKA-RP100FAL
PKA-RP100FAL#1
PKH-P100FALH
High
NOTCH
Low
46
SPL(dB)
41
LINE
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