6
NOISE CRITERIA CURVES
4
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, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions,
Cooling : DB27
:
WB19
:
Heating : DB20
:
WB -
:
MSC-GA20VB-
E1
COOLING
High
FUNCTION
FAN SPEED
36
HEATING
SPL(dB
(A)
)
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, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions.
Cooling : DB27
:
WB19
:
Heating : DB20
:
WB -
:
MSC-GA25VB-
E1
COOLING
High
FUNCTION
FAN SPEED
36
HEATING
39
SPL(dB
(A)
)
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, dB re 0.0002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
Test conditions.
Cooling : DB27
:
WB19
:
Heating : DB20
:
WB -
:
MSC-GA35VB-
E1
COOLING
FUNCTION
FAN SPEED
40
HEATING
High
39
SPL(dB
(A)
)
LINE
INDOORUNIT
WALL
MICROPHONE
0.8m
1m
OB385-1.qxp 05.1.25 14:50 Page 6