Adamsson Circular Attenuators - Standard Construction
1.2 mm pre galvanised iron outer casing
32 kg / m3 density insulation faced with matt black lining
0.8 mm perferated zinc anneal 11% open splitter casing
Attenuator air intake or air discharge can be manufactured to suit axial fan PCD and/or for flexible connection
Adamsson Circular Attenuators - ACA and ACPA
Fan Diameter
Model
Insertion loss dB / Octave band centre frequencies Hz
63
125
250
500
1K
2K
4K
8K
300 - 500 mm
ACA - 1D
2
4
6
9
13
10
7
8
ACA - 2D
4
7
12
17
21
17
13
13
ACPA - 1D
4
6
8
12
19
21
18
16
ACPA - 2D
7
10
15
23
31
35
30
28
600 - 900 mm
ACA - 1D
3
4
8
13
13
9
8
7
ACA - 2D
6
8
14
22
23
15
13
10
ACPA - 1D
4
6
9
16
25
21
18
12
ACPA - 2D
8
11
16
29
38
35
32
22
1000 - 1500 mm
ACA - 1D
3
4
9
13
11
8
7
7
ACA - 2D
6
8
14
21
19
13
12
10
ACPA - 1D
4
6
11
21
20
16
14
11
ACPA - 2D
8
11
19
29
31
30
24
17
1500 - 2500 mm
ACA - 1D
4
5
10
13
10
7
6
6
ACA - 2D
8
9
15
19
18
12
11
9
ACPA - 1D
5
7
12
20
19
14
12
9
ACPA - 2D
10
14
22
27
30
29
18
15
Please click on the images below for a closer view :
Circular Attenuators - Enquiry Form
Your Information
Name
Company
Company Location
Contact Number
Fax
Email Address
Fan make and model number
Air volume
1 / S
m3 / S
m3 / hr
Maximum pressure drop allowed
Pa
Fan diameter
mm
In duct sound power level if known
db (A)
Target noise level at 3 meters
db (A)
Or
NR
Or
NC
Adamsson Engineering.
Unit 3 / 7 Hector Street West, Osborne Park Western Australia 6017.
Phone: 61 8 9242 7677. Fax: 61 8 9242 7678.
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email:enquiries@adamsson.com.au