Mitsubishi Electric TRANE SLZ Series Technical & Service Manual page 10

NOISE CRITERION CURVES
NTXCKS09A112AA
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
NTXCKS15A112AA
90
80
70
60
50
40
30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63 125 250
BAND CENTER FREQUENCIES, Hz
CEILING
MICROPHONE
OCHT669
<60Hz>
NOTCH SPL(dB) LINE
High 31
Medium 28
Low 25
500 1000 2000 4000 8000
<60Hz>
NOTCH SPL(dB) LINE
High 39
Medium
34
Low
27
500 1000 2000 4000 8000
UNIT
4 ft
NTXCKS12A112AA
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
APPROXIMATE
20
THRESHOLD OF
HEARING FOR
NC-20
CONTINUOUS
NOISE
10
63
NTXCKS18A112AA
90
80
70
NC-70
60
NC-60
50
NC-50
40
NC-40
30
NC-30
APPROXIMATE
20
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.
10
NOTCH SPL(dB)
High
Medium
Low
125 250 500 1000 2000
BAND CENTER FREQUENCIES, Hz
NOTCH SPL(dB)
High
Medium
Low
125 250 500 1000 2000
BAND CENTER FREQUENCIES, Hz
<60Hz>
LINE
34
30
25
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
4000 8000
<60Hz>
LINE
43
40
32
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
4000 8000