Mitsubishi Electric SLZ Series Technical & Service Manual page 8

NOISE CRITERION CURVES
SLZ-KF09NA1
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125
BAND CENTER FREQUENCIES, Hz
SLZ-KF15NA1
90
80
70
60
50
40
30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125
BAND CENTER FREQUENCIES, Hz
CEILING
MICROPHONE
TCH118
<60Hz>
NOTCH SPL(dB)
High 31
Medium
28
Low
25
250 500 1000 2000 4000 8000
<60Hz>
NOTCH SPL(dB)
High 39
Medium 34
Low 27
250 500 1000 2000 4000 8000
UNIT
4 ft
SLZ-KF12NA1
LINE
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
NC-20
CONTINUOUS
NOISE
10
63
SLZ-KF18NA1
LINE
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
20 APPROXIMATE
THRESHOLD OF
HEARING FOR
NC-20
CONTINUOUS
NOISE
10
63
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.
8
NOTCH SPL(dB)
High 34
Medium
30
Low
25
125 250 500 1000 2000 4000
BAND CENTER FREQUENCIES, Hz
NOTCH SPL(dB)
High 43
Medium 40
Low 32
125 250 500 1000 2000 4000
BAND CENTER FREQUENCIES, Hz
<60Hz>
LINE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
8000
<60Hz>
LINE
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
8000