Sound Pressure Levels - Mitsubishi Electric Mr.SLIM PEAD-A24AA Service Manual

5

SOUND PRESSURE LEVELS

5-1. Sound pressure level
Ceiling concealed
5-2. NC curves
PEAD-A24AA
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125 250
Octave band center frequencies (Hz)
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125 250
Octave band center frequencies (Hz)
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125 250
Octave band center frequencies (Hz)
Aux. duct
test unit
2m
Measurement location
External static pressure 0.14 [in.WG] (35Pa)
High Low
Middle
NC-60
NC-50
NC-40
NC-30
NC-20
500 1k 2k 4k 8k
External static pressure 0.20 [in.WG] (50Pa)
High Low
Middle
NC-60
NC-50
NC-40
NC-30
NC-20
500 1k 2k 4k 8k
External static pressure 0.28 [in.WG] (70Pa)
High Low
Middle
NC-60
NC-50
NC-40
NC-30
NC-20
500 1k 2k 4k 8k
1m
External static pressure 0.40 [in.WG] (100Pa)
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125 250 500
Octave band center frequencies (Hz)
External static pressure 0.60 [in.WG] (150Pa)
70.0
65.0
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
15.0
Approximate minimum
10.0
audible limit on
continuous noise
5.0
0.0
63 125 250 500
Octave band center frequencies (Hz)
12
High Low
Middle
NC-60
NC-50
NC-40
NC-30
NC-20
1k 2k 4k 8k
High Low
Middle
NC-60
NC-50
NC-40
NC-30
NC-20
1k 2k 4k 8k