Mitsubishi PLA-RP Service Manual Page 59

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59
UNIT
1.5m
MICROPHONE
CEILING
PLA-RP5AA.UK
PLA-RP5AA
1.UK
PLA-RP6AA.UK
PLA-RP6AA1.UK
NOTCH SPL(dB) LINE
45
43
40
37
NOTCH SPL(dB) LINE
45
43
40
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
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
High
Medium1
Medium2
Low
High
Medium1
Medium2
Low
OC297-E-2.qxp 05.5.6 5:34 PM Page 59
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