Mitsubishi Electric PLA-RP50 Service Manual Page 11

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11
6
NOISE CRITERION CURVES
PLA-RP35BA.UK
PLA-RP35BA1.UK
PLA-RP35BA#2.UK
PLA-RP50BA.UK
PLA-RP50BA1.UK
PLA-RP50BA#2.UK
NOTCH SPL(dB) LINE
High 31
Medium1 29
Medium2 28
Low 27
NOTCH SPL(dB) LINE
High 32
Medium1 31
Medium2 29
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
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
BAND CENTER FREQUENCIES, Hz
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
PLA-RP60BA.UK
PLA-RP60BA1.UK
PLA-RP60BA#2.UK
PLA-RP71BA.UK
PLA-RP71BA1.UK
PLA-RP71BA#2.UK
PLA-RP71BA2.UK
NOTCH SPL(dB) LINE
High 32
Medium1 31
Medium2 29
Low 28
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
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
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
OCTAVE .UKND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 μbar)
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