Noise Criterion Curves - Mitsubishi Electric SEZ-KC25VA Technical & Service Manual

NOISE CRITERION CURVES

SEZ-KC25VA.W
NOTE: The sound level is measured in an anechoic room where echoes are few, when compressor stops. The sound
may be bigger than displayed level under actual installation condition by surrounding echoes. The sound level
can be higher by about 2 dB than the displayed level during cooling and heating operation.
70
60
50
40
30
20
10
Appro
Approximate minimum
audible limit on continuous noise
0
63 125 250 500
OCTAVE BAND CENTER FREQUENCIES (Hz)
Aux.duct
1m
Measurement location
5
<50Hz>
NOTCH
SPL(dB)
Hi 36
Lo 25
High speed
Low speed
1000 2000 4000 8000
2m
NC60
NC50
NC40
NC30
NC20