6
90
80
70
60
50
40
30
20
10
63
125
250
500
1000
2000
4000
8000
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002
µ
bar)
BAND CENTER FREQUENCIES, Hz
SEZ-KA50VA.TH
High
Low
39
SPL(dB)
31
LINE
<50Hz>
NOTCH
90
80
70
60
50
40
30
20
10
63
125
250
500
1000
2000
4000
8000
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002
µ
bar)
BAND CENTER FREQUENCIES, Hz
SEZ-KA35VA.TH
High
Low
35
SPL(dB)
30
LINE
<50Hz>
NOTCH
NOISE CRITERION CURVES
UNIT
External static
pressure 30Pa
1.5m
MICROPHONE
90
80
70
60
50
40
30
20
10
63
125
250
500
1000
2000
4000
8000
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002
µ
bar)
BAND CENTER FREQUENCIES, Hz
NC-60
NC-50
NC-40
NC-30
NC-20
NC-70
SEZ-KA60VA.TH
High
Low
43
SPL(dB)
32
LINE
<50Hz>
NOTCH
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.
OC321-A-1.qxp 05.2.24 8:54 AM Page 6
