Technibel CAFP 124 R Technical Data & Service Manual page 68

1
1-8. Noise Criterion Curves
Conc ealed-Duc t Type
MODE L :DSAFP255R
S OUND LE VE L : HIGH 34 dB(A), NC 22 / LOW 27 dB(A), NC 18
C ONDIT ION : Under the unit 1.5 m
S OUR C E : 220 - 230 - 240 V ,
60
50
40
30
20
AP P R OXIMAT E
T HR E S HOLD OF
HE AR ING F OR
C ONT INUOUS
NOIS E
10
63
F requency at center of s ound pres s ure band (Hz)
S ingle P has e, 50 Hz
125 250 500 1000 2000 4000 8000
NC -50
NC -40
NC -30
NC -20
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