ALPRO® Wall Baffles are fully factory assembled, modular units of formed perforated metal skin, reinforced by structural components, containing encapsulated acoustical energy absorbing material.
ALPRO Wall Baffles provide a fast, cost-effective method for controlling reverberant noise in existing facilities, and are ideal for use in water treatment plants, natatoriums, hospitality areas, auditoriums – any space where reverberant noise is a problem.
ALPRO baffles are finished in your choice of standard or custom powder coat colors. Post fabrication powder coating assures total coverage of all surfaces for maximum protection from attack by moisture or airborne contaminants.
Standard Construction
Metal Facing Materials
- Aluminum, .020" in smooth surface, .032" thickness in stucco-embossed or smooth surface
- Steel, 22, 24, or 26 gauge thickness, G-90 galvanized smooth surface
- Perforation Pattern, diameter holes on 21/64” (0.328”) staggered centers; 13.2% open area
- Optional Backing Panels are made of the same metal as the face and are available for total encapsulation of the sound absorptive material and enhanced acoustical performance.
Note: Special metals or custom perforation patterns may be available for unique applications. Please consult with the factory or your ALPRO representative for availability.
Frames
- Aluminum framing members provide the skeletal structure of the baffle.
- Standard baffle thickness is 2 inches, with custom thicknesses available from 1 inch up to 6 inches.
- Internal stabilizers are required for baffles over 48” long. (The exact quantity and spacing of stabilizers will depend on material thickness and baffle design.)
Without Stabilizer
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Single Stabilizer
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Double Stabilizer
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Sound Absorbers
- 1.5# density x 2" thick fiberglass, encapsulated in 1.5 mil thickness black polyethylene, fully sealed
- 1.5# density x 2" thick fiberglass, encapsulated in 2.5 mil thickness low gloss black PVC, fully sealed
- 1.5# density x 2" thick fiberglass, encapsulated in .75 mil thickness high gloss clear PVC, fully sealed
Note: Special sound absorbing materials may be used to accommodate baffles with custom thickness or special acoustical performance requirements. Please consult with the factory or your ALPRO representative for availability.
Mounting Methods
- Flush Mounts: Extruded aluminum mounting strips allow the baffle to mount flush against existing wall structure.
- Offset Mounts: “Z” Clips are available in 1”, 2”, or 4” lengths for offset mounting to improve acoustical performance.
- Tunnel Mounts: Reinforced sleeves in the baffle corners allow for through-baffle bolt attachment directly to the mounting surface.
Note: Special metals or custom perforation patterns may be available for unique applications. Please consult with the factory or your ALPRO representative for availability.
Acoustics
Laboratory tests to evaluate the sound absorption of ALPRO baffles show results in a range from .90 to 1.15 when tested in accordance with ASTM C-423.
ALPRO baffles are furnished with sound absorbing material already installed to assure predictable results, up to a perfect rating of NRC = 1.0 (1.0 sabin/square foot), based on extensive product testing.
Sound Absorption of Alpro Baffles
Baffle width 30"
x Length
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Freq.(Hz)
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4'
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5'
|
6' |
8' |
10' |
|
125 |
3.2 |
4.0 |
4.8 |
6.4 |
8.0 |
|
250 |
9.4 |
11.8 |
14.1 |
18.6 |
23.6 |
|
500 |
13.6 |
17.0 |
20.4 |
27.2 |
34.0 |
|
1000 |
12.0 |
15.0 |
18.0 |
24.0 |
30.0 |
|
2000 |
10.4 |
13.0 |
15.6 |
20.8 |
26.0 |
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4000 |
8.6 |
10.8 |
12.9 |
17.2 |
21.6 |
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Sabins |
11.4 |
14.2 |
17.0 |
22.7 |
28.4 |
|
Values expressed in Sabins Test RAL A90-193 1.5# X 2" PVC wrapped fiberglass, 4"
airspace. |
Range of Acceptable Reverberation Times 500 cps
The lower line is most suitable for areas of speech; upper line for music. For general use, a reverberation time (vertical scale) between the two lines is recommended.
Actual acoustical performance of your baffle installation depends on a variety of factors including, baffle thickness, coverage area, mounting method, type and density of sound absorbing material utilized, room volume, and materials of building construction.
Consult with the factory or your ALPRO representative to discuss your particular noise abatement challenges and for application suggestions to maximize acoustical performance for your project.
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