Sound Pressure Levels - Mitsubishi Electric PEAD Series Service Manual

SOUND PRESSURE LEVELS

5. SOUND PRESSURE LEVELS
5-1. Sound pressure level
Ceiling concealed
5-2. NC curves
PEAD-A12AA7
External static pressure 0.14 [in.WG] (35Pa)
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)
External static pressure 0.20 [in.WG] (50Pa)
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)
External static pressure 0.28 [in.WG] (70Pa)
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)
HWE16080
High Low
Middle
NC-60
NC-50
NC-40
NC-30
NC-20
500 1k 2k 4k 8k
High Low
Middle
NC-60
NC-50
NC-40
NC-30
NC-20
500 1k 2k 4k 8k
High Low
Middle
NC-60
NC-50
NC-40
NC-30
NC-20
500 1k 2k 4k 8k
15
Aux. duct
test unit
2m
Measurement location
External static pressure 0.40 [in.WG] (100Pa)
70.0
High
Middle
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 1k
Octave band center frequencies (Hz)
External static pressure 0.60 [in.WG] (150Pa)
70.0
High
65.0 Middle
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 1k
Octave band center frequencies (Hz)
1m
Low
NC-60
NC-50
NC-40
NC-30
NC-20
2k 4k 8k
Low
NC-60
NC-50
NC-40
NC-30
NC-20
2k 4k 8k