NOISE CRITERIA CURVES
4
MXZ-2B20NA
90
80
70
60
50
40
30
20
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63
125
250
BAND CENTER FREQUENCIES, Hz
MXZ-3B30NA
90
80
70
60
50
40
30
20
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63
125
250
BAND CENTER FREQUENCIES, Hz
OBH560G
FAN SPEED
FUNCTION
SPL(dB
)
LINE
(A)
49
High
Cooling
High
Heating
51
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500
1000
2000
4000
8000
FAN SPEED
FUNCTION
SPL(dB
)
LINE
(A)
49
High
Cooling
High
Heating
49
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500
1000
2000
4000
8000
MXZ-3B24NA
90
80
70
60
50
40
30
20
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63
125
250
BAND CENTER FREQUENCIES, Hz
MXZ-4B36NA
90
80
70
60
50
40
30
20
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63
125
9
FAN SPEED
FUNCTION
SPL(dB
)
LINE
(A)
54
High
Cooling
High
Heating
49
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500
1000
2000
4000
8000
FAN SPEED
FUNCTION
SPL(dB
)
(A)
54
High
Cooling
57
High
Heating
250
500
1000
2000
4000
8000
BAND CENTER FREQUENCIES, Hz
LINE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20