Mitsubishi MUH-A18WV, Service Manual

Page: 8 / 48

8
NOISE CRITERIA CURVES 4
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
Test conditions,
Cooling : Dry-bulb temperature 35
: Wet-bulb temperature 24 :
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
52
SPL(dB(A)) LINE
High
FAN SPEED
Heating : Dry-bulb temperature 7 : Wet-bulb temperature 6 :
OCT
A
VE 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
Test conditions,
Cooling : Dry-bulb temperature 35
:
Wet-bulb temperature 24
:
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
53
SPL(dB(A)) LINE
High
FAN SPEED
Heating : Dry-bulb temperature 7 : Wet-bulb temperature 6 :
OCT
A
VE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
MUH-A18WV-
E1
MUH-A24WV-
E1
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
Test conditions,
Cooling : Dry-bulb temperature 35
: Wet-bulb temperature 24 :
APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
55
SPL(dB(A)) LINE
High
FAN SPEED
Heating : Dry-bulb temperature 7 : Wet-bulb temperature 6 :
OCT
A
VE BAND SOUND PRESSURE LEVEL, dB re 0.0002 MICRO BAR
MUH-A30WV-
E1
OUTDOORUNIT
MICROPHONE
1m
OB322-1.qxp 03.11.13 4:06 PM Page 8