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NOISE CRITERIA CURVES6
90
80
70
60
50
40
30
20
10
63 125 250 500 1000 2000 4000 8000
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, 0dB = 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions.
Cooling :DB35: WB24:
Heating :DB 7: WB 6:
COOL
NOTCH
HEAT
46
SPL(dB(A))
47
LINE
MXZ-24UV -
E1
MXZ-24UV -
E2
OB287--1.qxp 03.1.16 10:29 AM Page 8