6
Sound Pressure Level
NOTES: TEST POINTS ARE AS BELOW:
1) TEST POINTS ARE AS BELOW:
Air Duct
Test Point
1 m
Test
Unit
Back
Return
Plenum
1
m
2) THE SOUND LEVEL IS TESTED UNDER 11.5DBA BACKGROUND NOISE IN A BAFFLE CHAMBER WITH ESP OF 50PA AND 75PA.
ESP
50 Pa
75 Pa
Unit Speed
1/1 Octave Sound pressure level [dB(A),ref 20 uPa]
Total
dB(A)
1/1 Octave Sound pressure level
[
dB(A),ref 20 uPa
]
Total
dB(A)
125
250
500
1k
2k
4k
8k
125
250
500
1k
2k
4k
8k
200DA
H
26.1
34.3
37.6
40.4
33.1
22.8
14.1
43.4
24.9
33.9
37.4
40.2
33.6
24.4
15.0
43.3
M
27.0
33.4
36.9
39.6
32.1
21.6
13.7
42.7
26.2
33.8
36.4
39.5
32.9
23.5
14.6
42.6
L
27.8
29.2
33.5
35.9
28.1
18.1
13.0
39.2
26.6
30.6
34.2
37.2
30.0
20.8
13.7
40.2
300DA
H
27.7
35.0
36.5
44.3
36.4
25.4
16.1
46.0
29.2
35.5
37.0
44.7
37.1
26.9
17.5
46.5
M
28.3
34.3
35.4
43.1
35.6
24.6
15.5
45.0
29.7
34.5
36.2
43.8
36.1
25.9
16.7
45.6
L
27.9
31.2
32.8
40.1
32.2
20.9
14.3
42.0
25.0
32.6
34.2
41.5
34.0
23.6
15.4
43.4
400DA
H
26.9
36.7
38.8
42.6
37.8
25.7
14.6
45.7
28.7
36.5
39.2
42.8
38.3
26.2
15.2
46.0
M
27.9
35.3
38.2
41.8
36.8
24.6
13.7
44.9
28.2
36.5
38.3
42.1
37.5
25.9
15.0
45.3
L
27.3
32.3
35.8
38.4
33.8
20.8
11.4
41.9
27.4
34.3
37.0
40.3
36.3
24.3
14.0
43.7
500DA
H
29.7
39.1
40.4
43.9
38.1
29.0
18.3
47.1
30.3
39.3
40.4
43.7
38.3
29.2
18.1
47.1
M
28.9
38.7
39.7
43.6
37.9
28.3
17.6
46.8
29.7
38.7
39.9
43.3
37.7
28.7
17.5
46.7
L
27.3
36.7
37.8
41.3
35.6
26.2
15.8
44.6
27.3
36.5
38.0
41.5
36.3
27.1
16.2
44.8
600DA
H
30.5
40.9
41.8
46.6
42.7
29.8
18.5
49.7
33.2
40.7
42.3
45.8
43.4
29.9
20.5
49.6
M
30.8
40.0
41.6
46.1
42.1
29.2
18.3
49.2
30.2
40.5
41.7
46.0
42.1
29.0
17.5
49.2
L
31.5
37.5
39.3
43.5
38.8
25.4
15.1
46.6
29.9
38.1
39.8
44.2
40.3
26.9
15.6
47.4
800DA
H
34.7
41.1
42.2
45.9
39.8
29.1
19.7
49.1
33.2
40.7
42.3
46.0
40.2
29.9
20.5
49.2
M
33.6
40.5
41.9
45.4
39.5
28.8
19.3
48.6
33.4
40.5
41.9
45.5
39.6
29.6
20.0
48.7
L
31.7
38.5
40.3
43.9
37.5
26.6
16.8
47.0
32.5
39.0
40.7
44.3
38.3
27.6
18.0
47.5
900DA
H
34.1
40.9
42.3
45.7
40.3
29.9
20.6
49.1
35.1
40.9
41.2
45.4
40.0
30.1
20.8
48.7
M
34.6
39.8
41.3
45.3
39.8
29.5
20.1
48.5
34.5
40.2
40.9
44.8
39.5
30.0
20.5
48.2
L
33.2
38.7
39.9
43.8
38.0
27.7
18.3
47.0
33.4
38.4
39.8
43.8
38.3
28.4
18.9
47.0
1000DA
H
33.8
42.5
44.3
47.5
41.2
30.7
20.5
50.7
35.2
41.9
44.4
47.4
41.4
31.1
21.1
50.7
M
33.2
41.7
43.9
46.9
40.7
30.0
19.8
50.1
34.0
40.8
44.0
47.3
41.0
31.0
21.3
50.3
L
33.2
40.1
42.1
45.3
38.8
28.0
17.3
48.5
33.2
40.1
42.8
45.7
39.6
29.5
19.3
49.0
1200DA
H
37.2
44.7
44.1
47.7
42.6
34.0
26.2
51.5
37.4
44.8
44.4
47.9
42.2
33.7
25.6
51.6
M
36.1
43.0
43.1
47.2
41.1
32.5
24.6
50.5
37.0
43.7
43.8
47.3
41.5
32.8
24.6
50.9
L
34.3
39.9
40.8
43.3
37.2
28.0
19.2
47.1
35.1
41.7
42.0
44.5
38.7
29.6
20.3
48.5
1400DA
H
39.2
45.0
43.6
47.7
41.8
33.2
26.5
51.5
39.3
45.5
43.8
47.5
41.6
33.3
26.4
51.5
M
37.7
44.7
43.2
47.3
40.9
32.4
25.6
51.0
38.4
44.9
43.1
46.9
41.0
32.6
25.5
50.9
L
35.5
41.3
40.2
43.7
37.4
28.4
21.1
47.6
36.4
42.1
40.4
43.7
37.5
28.6
20.9
47.9
1600DA
H
41.3
46.1
46.4
51.2
44.1
34.6
27.9
54.1
45.3
45.8
46.0
50.4
43.6
33.7
27.0
54.0
M
40.5
45.1
45.7
50.2
42.7
33.2
26.2
53.1
41.6
44.7
45.4
49.8
42.5
32.4
25.5
52.9
L
38.2
40.3
42.2
46.0
37.8
27.6
19.8
49.0
43.6
41.2
42.4
46.2
38.4
27.9
20.4
50.1
