Mitsubishi Electric Mr.Slim PLY-P18BA.TH, Service Manual

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5
NOISE CRITERION CURVES
PLY-P18BA.TH
NOTCH SPL(dB) LINE
High 32
Medium1 30
Medium2 29
Low 28
OCT
AVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
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
BAND CENTER FREQUENCIES, Hz
UNIT
1.5m
MICROPHONE
CEILING
PLY-P24BA.TH
NOTCH SPL(dB) LINE
High 34
Medium1 32
Medium2 30
Low 28
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
BAND CENTER FREQUENCIES, Hz
OCT
AVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
PLY-P30BA.TH
NOTCH SPL(dB) LINE
High 41
Medium1 38
Medium2 35
Low 33
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
OCT
AVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
PLY-P36BA.TH
PLY-P42BA.TH
PLY-P48BA.TH
NOTCH SPL(dB) LINE
High 44
Medium1 41
Medium2 39
Low 37
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
OCT
AVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
OCH551A