Nc Curves - Mitsubishi Electric PEY Series Service Manual

SOUND PRESSURE LEVELS

5-2. NC curves

PEY-P18JA(L)(T)
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)
PEY-P18JA(L)(T)
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)
PEY-P18JA(L)(T)
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)
HWE1305A
(External static pressure 35Pa)
High Low
Middle
NC-60
NC-50
NC-40
NC-30
NC-20
1k 2k 4k 8k
(External static pressure 50Pa)
High Low
Middle
NC-60
NC-50
NC-40
NC-30
NC-20
1k 2k 4k 8k
(External static pressure 70Pa)
High Low
Middle
NC-60
NC-50
NC-40
NC-30
NC-20
1k 2k 4k 8k
PEY-P18JA(L)(T)
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)
PEY-P18JA(L)(T)
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)
19
(External static pressure 100Pa)
High Low
Middle
500 1k 2k 4k
(External static pressure 125Pa)
High Low
Middle
500 1k 2k 4k
NC-60
NC-50
NC-40
NC-30
NC-20
8k
NC-60
NC-50
NC-40
NC-30
NC-20
8k