35
ARTUS™ Technical Manual 9690348 v3_04_2020
Te
ch
nic
al
Notes:
SWL is the Sound Power Level relative to a reference value of 1 x 10
-12
W.
Fan Speed based upon External Static Pressure (ESP) of 0Pa.
Overall
dB(A)
Frequency (Hz) dB
Airflow l/s
Sound Measurement
63
125
250
500
1000
2000
4000
8000
57
Sound Power (Supply)
30
43
35
32
28
21
18
19
20
Sound Power (Return)
30
43
36
34
26
18
18
19
20
80
Sound Power (Supply)
37
47
40
37
36
30
21
20
21
Sound Power (Return)
35
48
42
40
34
23
19
20
20
111
Sound Power (Supply)
45
53
48
45
44
40
32
22
20
Sound Power (Return)
43
53
49
47
41
32
27
20
20
140
Sound Power (Supply)
50
59
52
49
49
46
41
28
21
Sound Power (Return)
48
59
53
52
46
39
34
23
20
164
Sound Power (Supply)
54
62
55
53
52
50
46
35
23
Sound Power (Return)
51
63
56
55
50
42
39
27
21
Assessment by an Acoustic Consultant
For maximum accuracy the assessment of the acoustics is best undertaken by an acoustic consultant. Many factors
need to be taken into account, including the noise generated by each Artus unit, the effect of multiple Artus units, the
distance between noise source and observer, room reverberation and the extent of absorption by surfaces. In order to
enable an acoustic consultant to carry out a detailed analysis, the following tables of octave band sound power levels
(Lw dB) have been obtained from lab tests for different fan speeds, and are a combined sound level for discharge
and suction sides of the unit. The units do not exhibit high levels of directionality when compared to other air-terminal
devices and details can be provided on request.
Overall
dB(A)
Frequency (Hz) dB
Airflow l/s
Sound Measurement
63
125
250
500
1000
2000
4000
8000
57
Sound Power (Supply)
31
43
36
32
30
23
18
20
20
Sound Power (Return)
31
44
37
35
28
19
18
20
20
80
Sound Power (Supply)
38
48
42
39
38
32
23
20
21
Sound Power (Return)
37
49
43
41
36
25
20
20
20
111
Sound Power (Supply)
46
55
49
46
45
42
34
24
20
Sound Power (Return)
44
55
50
48
43
34
29
21
20
140
Sound Power (Supply)
52
60
53
51
50
48
43
31
22
Sound Power (Return)
49
61
54
53
48
40
36
25
21
164
Sound Power (Supply)
56
63
56
54
53
52
49
37
25
Sound Power (Return)
53
64
58
56
51
44
41
29
21
1 Coil Units
2 Coil Units
Comfort
ARTUS™