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 may be hung vertically from the baffle side or end, or may be
suspended horizontally like a cloud.
ALPRO Wall Baffles provide a fast, cost-effective method for controlling reverberant
noise in existing facilities, and are ideally suited for use in water treatment
or other industrial facilities, 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, .032" thickness in stucco-embossed or
smooth surface
- Steel 22, 24, or 26 gauge thickness, G-90 galvanized smooth surface
- Perforation Pattern, 1/8” (0.125”) diameter holes on 21/64” (0.328”) staggered
centers; 13.2% open area
- Backer Panels are made of the same metal as the face and provide 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 1inch
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.)
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 structures.
- Angle Mounts: “L” shaped angle brackets permit bolt-up flush mounting against
existing wall structures.
- Offset Mounts: “Z” Clips are available in 1”, 2”, or 4” lengths for offset
fixed mounting to finished walls for improved acoustical performance.
- Horizontal Tunnel Mounts: Reinforced sleeves in the baffle corners allow
for through-baffle direct wall attachment by bolt or suspension from wall structures
via threaded rods.
- Eye Bolts: Threaded nutsert receptacles are built into the baffles for field
installation of eyebolts used to suspend the baffles from wall structures.
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
|
|
Freq.(Hz)
|
4'
|
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
|
|
4000
|
8.6
|
10.8
|
12.9
|
17.2
|
21.6
|
|
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.