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
OCT
A
VE BAND SOUND PRESSURE LEVEL, 0dB = 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Cooling
High
FUNCTION
FAN SPEED
Heating
High
48
SPL(dB
(A)
)
50
LINE
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
OCT
A
VE BAND SOUND PRESSURE LEVEL, 0dB = 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Cooling
High
FUNCTION
FAN SPEED
Heating
High
49
SPL(dB
(A)
)
50
LINE
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
OCT
A
VE BAND SOUND PRESSURE LEVEL, 0dB = 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Cooling
High
FUNCTION
FAN SPEED
Heating
High
47
SPL(dB
(A)
)
48
LINE
27
NOISE CRITERIA CURVES
6
MXZ-2A40VA
MXZ-2A52VA
MXZ-4A71VA
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
OCT
A
VE BAND SOUND PRESSURE LEVEL, 0dB = 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Cooling
High
FUNCTION
FAN SPEED
Heating
High
46
SPL(dB
(A)
)
48
LINE
MXZ-3A54VA
OB377--1.qxp 05.12.14 3:17 PM Page 27