Noise Criteria Curves - Mitsubishi Electric MCF-13NV-E3 Service Manual

4

NOISE CRITERIA CURVES

MCF-13NV -
E3
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
SPL(dB ) LINE
NOTCH
(A)
Hi
43-44
(220-240V)
Test conditions,
Cooling : DB 27: WB 19:
500 1000 2000 4000
MUCF-13NV -
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
NC-20
CONTINUOUS
NOISE
10
8000
63
5
E3
NOTCH SPL(dB
Hi
49
Test conditions,
Cooling : DB 35: WB 24:
125 250 500 1000 2000
BAND CENTER FREQUENCIES, Hz
) LINE
(A)
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
4000 8000