6
NOISE CRITERIA CURVES
4
MSZ-HR25VF
MSZ-HR35VF
MSZ-HR42VF
MSZ-HR50VF
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
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A))
LINE
45
HEATING
46
OCT
AVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
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
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A))
LINE
45
HEATING
47
OCT
AVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
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
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A))
LINE
43
HEATING
43
OCT
AVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
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
BAND CENTER FREQUENCIES, Hz
COOLING
FUNCTION SPL(dB(A))
LINE
46
HEATING
44
OCT
AVE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
OBH822B