Nc curves – MITSUBISHI ELECTRIC PRH-5 User Manual
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NC CURVES
NC-20
NC-30
NC-40
NC-50
NC-60
NC-70
50Hz
Note. The measuring point is 1m from the comp. service panel.
20
30
40
50
60
70
80
90
45
octave-band frequency [Hz]
octave-band lebel db (0db=0.0002ubar)
over
all
63
90
125
180
250
355
500
710
1000
1400
2000
2800
4000
5600
8000
10
70
64db
COOLING &
HEATING
50
52
56
58
60
62
67
500 Hz
250 Hz
125 Hz
8000 Hz
4000 Hz
2000 Hz
1000 Hz
63 Hz
CONDITION
A scale
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
50Hz
Note. The measuring point is 1m from the comp. service panel.
20
30
40
50
60
70
80
90
45
octave-band frequency [Hz]
octave-band lebel db (0db=0.0002ubar)
over
all
63
90
125
180
250
355
500
710
1000
1400
2000
2800
4000
5600
8000
10
COOLING &
HEATING
67
62db
43
45
50
57
61
62
63
500 Hz
250 Hz
125 Hz
8000 Hz
4000 Hz
2000 Hz
1000 Hz
63 Hz
CONDITION
A scale
PR-5YC
PRH-5YA
PRH-5YA-L
PR-8YC
PRH-8YA
PRH-8YA-L