5
NOISE CRITERIA CURVES
4
MCFH-13NV -
E3
MUCFH-13NV -
E3
90
80
70
60
50
40
30
20
10
63
125
250
500
1000
2000
4000
8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCT
A
VE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : DB 27
:
WB 19
:\
Heating : DB 20
:
WB -
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
Hi
(220-240V)
NOTCH
46-47
SPL(dB
(A)
)
LINE
90
80
70
60
50
40
30
20
10
63
125
250
500
1000
2000
4000
8000
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCT
A
VE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : DB 35
:
WB 24
:
Heating : DB 7
:
WB 6
:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NOTCH
49
SPL(dB
(A)
)
LINE
Hi
(220-240V)