Mitsubishi PLA-RP Service Manual Page 58

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58
PLA-RP1.6AA.UK PLA-RP2AA.UK
PLA-RP2.5AA.UK
NOTCH SPL(dB) LINE
High
Medium1
Medium2
Low
High
Medium1
Medium2
Low
31
29
28
27
NOTCH SPL(dB) LINE
33
31
29
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
6-6. NOISE CRITERION CURVES
PLA-RP3AA.UK
PLA-RP3AA
1.UK
PLA-RP4AA.UK
PLA-RP4AA1.UK
NOTCH SPL(dB) LINE
34
32
30
28
NOTCH SPL(dB) LINE
41
39
36
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
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
High
Medium1
Medium2
Low
High
Medium1
Medium2
Low
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)
OC297-E-2.qxp 05.5.6 5:34 PM Page 58
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