Mitsubishi SLZ-KA25VAQ Technical & Service Manual page 6

NOISE CRITERION CURVES
SLZ-KA25VAQ.TH
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
SLZ-KA50VAQ.TH
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
NOTE: The sound level is measured in an anechoic room where echoes are few, when compressor stops. The sound
may be bigger than the indicated level in actual use due to surrounding echoes. The sound level can be higher
by about 2 dB than the indicated level during cooling and heating operation.
<50Hz>
NOTCH SPL(dB) LINE
High 37
Medium 31
Low
28
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
<50Hz>
NOTCH SPL(dB) LINE
High 39
Medium
34
Low 30
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
SLZ-KA35VAQ.TH
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
CEILING
MICROPHONE
6
<50Hz>
NOTCH SPL(dB) LINE
High 38
Medium 33
Low
29
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500 1000 2000 4000 8000
UNIT
1.5 m