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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
7064db
COOLING &
HEATING
50525658606267
500 Hz250 Hz125 Hz
8000 Hz4000 Hz2000 Hz1000 Hz
63 HzCONDITION 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
6762db 43455057616263
500 Hz250 Hz125 Hz 8000 Hz4000 Hz2000 Hz1000 Hz63 HzCONDITION A scale
PR-5YC
PRH-5YA
PRH-5YA-L
PR-8YC
PRH-8YA
PRH-8YA-L