Mitsubishi Electric PLA-A·BA4 Technical Data Manual page 91

Split-type, heat pump air conditioners split-type, air conditioners
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PEA-A18AA4
External static pressure :
0.020[in.WG](5Pa)
90
80
70
60
50
40
30
20
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63
125
250
BAND CENTER FREQUENCIES, Hz
PEA-A18AA4
External static pressure :
0.140[in.WG](35Pa)
90
80
70
60
50
40
30
APPROXIMATE
20
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63
125
250
BAND CENTER FREQUENCIES, Hz
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.
<60Hz>
NOTCH
LINE
SPL(dB)
High
37
Middle
33
Low
29
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500
1000
2000
4000
8000
<60Hz>
NOTCH
SPL(dB)
LINE
High
39
Middle
35
Low
31
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500
1000
2000
4000
8000
PEA-A18AA4
External static pressure :
0.060[in.WG](15Pa)
90
80
70
60
50
40
30
20
APPROXIMATE
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63
125
250
BAND CENTER FREQUENCIES, Hz
PEA-A18AA4
External static pressure :
0.200[in.WG](50Pa)
90
80
70
60
50
40
30
APPROXIMATE
20
TERESHOLD OF
HEARING FOR
CONTINUOUS
NOISE
10
63
125
250
BAND CENTER FREQUENCIES, Hz
<60Hz>
NOTCH
LINE
SPL(dB)
High
38
Middle
34
Low
30
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500
1000
2000
4000
8000
<60Hz>
NOTCH
SPL(dB)
LINE
High
39
Middle
36
Low
32
NC-70
NC-60
NC-50
NC-40
NC-30
NC-20
500
1000
2000
4000
8000
91

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