33
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
OCT
A
VE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
SLH-1.6AR.TH
SLH-1.6AR
1
.TH
SL-1.6AR.TH
SL-1.6AR.TH-T
Hi
Me
39
SPL(dB)
37
LINE
<50Hz>
NOTCH
Lo
34
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
OCT
A
VE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
SLH-1AR.TH
SLH-1AR
1
.TH
SL-1AR.TH
SL-1AR.TH-T
Hi
Me
36
SPL(dB)
34
LINE
<50Hz>
NOTCH
Lo
31
NOISE CRITERION CURVES
UNIT
1.5m
MICROPHONE
CEILING
Ambient temperature 27
:
Test conditions are based on JIS Z8731
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
OCT
A
VE BAND SOUND PRESSURE LEVEL, dB re 0.002 MICRO BAR
BAND CENTER FREQUENCIES, Hz
SLH-2AR.TH
SLH-2AR
1
.TH
SL-2AR.TH
SL-2AR.TH-T
Hi
Me
40
SPL(dB)
38
LINE
<50Hz>
NOTCH
Lo
35
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.
OC280-B-2.qxp 03.5.23 2:55 PM Page 33