5
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 B
AND SOUND PRESSURE LEVEL,
dB (0 dB = 0.0002
μ
bar)
BAND CENTER FREQUENCIES, Hz
PEA-A12AA
External static pressure :
0.060[in.WG](15Pa)
High
Middle
33
SPL(dB)
28
Low
23
LINE
<60Hz>
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
OCT
A
VE B
AND SOUND PRESSURE LEVEL,
dB (0 dB = 0.0002
μ
bar)
BAND CENTER FREQUENCIES, Hz
PEA-A12AA
External static pressure :
0.020[in.WG](5Pa)
High
Middle
33
SPL(dB)
28
Low
23
LINE
<60Hz>
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
OCT
A
VE B
AND SOUND PRESSURE LEVEL,
dB (0 dB = 0.0002
μ
bar)
BAND CENTER FREQUENCIES, Hz
PEA-A12AA
External static pressure :
0.200[in.WG](50Pa)
High
Middle
35
SPL(dB)
31
Low
25
LINE
<60Hz>
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
OCT
A
VE B
AND SOUND PRESSURE LEVEL,
dB (0 dB = 0.0002
μ
bar)
BAND CENTER FREQUENCIES, Hz
PEA-A12AA
External static pressure :
0.140[in.WG](35Pa)
High
Middle
34
SPL(dB)
29
Low
24
LINE
<60Hz>
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.
SOUND CRITERION CURVES
