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| Applications
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Worship Spaces, Band Rooms, Choral Rooms, Music Practice Rooms, Auditoriums, Classrooms, Distance Learning
Centers, Conference rooms, Recording and Broadcast Studios, A/V rooms, Cinemas
and Home Theaters. |
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Application of T-bar mounted absorptive and reflective ceiling systems have been a traditional approach to acoustical control. However, sound can also be controlled using diffusion.
Since it’s introduction in 1984, the number theoretic QRD® 734 Diffusor has proven to be a
versatile general purpose diffusor. It’s uniform scattering, wide bandwidth, and broad selection
of finishes make it a logical choice for almost any speech, critical listening, or performance
facility. The Formedffusor™ brings this proven technology to a wider audience because of its low
price, ease of installation, Class A fire rating, light weight, impact resistance, and color options.
Problem
Furniture grade QRD® diffusors may be too heavy for some ceiling applications or too expensive for
large scale coverage. There is a need for a lightweight, Class A, cost effective, plastic QRD®.
Solution
To address this problem, RPG® developed a lightweight, thermoformed panel made of Class A thermoplastic sheet.
The diffuser has graceful curved inner and outer radii for an attractive appearance. Thermoplastics are
stiff and impact resistant allowing the Formedffusor™ to be used in almost any wall or ceiling
application.
 Absorption
In a drop ceiling application, there will be some absorption caused by leaks between the grid and tile as well as tile surface resonance. This is kept to a minimal amount with an FRG unit due to mass and surface rigidity.
A comparison of several RPG diffusive ceiling tiles is included here based on the E-Mount Random Incidence Reverberation Chamber test method.
Diffusion
The Formedffusor™ is based on the QRD® reflection phase grating introduced by RPG® in 1983.
It offers broad bandwidth wide angle diffusion. The graph illustrates the average diffusion
coefficient (1 is ideal) for all angles of incidence. Compared to a flat reflecting panel,
the QRD® maintains uniform diffusivity as a function of frequency above the diffraction limit.
Installation
When ceiling suspended in a 15/16" T-bar grid, the
Formedffusor™ sits flush with the grid. Wall mounting the
Formedffusor™ requires custom wooden stiles and rails
to capture the perimeter flange.
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Home:
Products:
Formedffusor™;
The
Original Molded One Dimensional QRD® Sound Diffuser From
The Acoustical Industry’s Leading Innovator
| Features
& Benefits |
Features
QRD® number theory sound diffusion
Lightweight thermoformed fabrication
Low frequency diaphragmatic absorption
Custom colors and textures
Can be oriented to provide one or two dimensional diffusion
in the far field
Panels nest into one another
Benefits
Low frequency absorption can be used to control boominess in
small rooms, while also providing uniform sound diffusion
Thermoformed panels are designed to nest for lower shipping
costs
Diffusors can be aligned linearly for diffusion in the direction
perpendicular to the well direction or rotated 90° forming
an alternating pattern to provide omnidirectional scattering
2' x 2' size offers more flexibility and higher diffusion performance
than larger periodic 4' x 4' formats with a smaller repeat unit
The Formedffusor™’s light weight makes handling and
installation simple |
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Copyright
2000, RPG Diffusor Systems, Inc.