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| Applications: Worship Spaces, Band Rooms, Choral Rooms, Stage Shells, Recording and Broadcast Studios, Auditoriums, Performing Arts Centers, Theaters and Cinemas.
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Overhead canopies are used in auditoriums to blend the direct and early reflected sound,
increasing speech intelligibility and enhancing musical clarity and intimacy. Traditionally, non-optimized,
periodic flat panels and arcs have been used. These arrays can give rise to non-uniform coverage, due to
array gaps, non-optimal shaping and periodicity effects. RPG has developed an optimization algorithm called
the Shape Optimizer, to provide optimal shaping and tilting offering omnidirectional scattering. RPG’s
patented Aperiodic Modulation of a Single Asymmetric Base Shape minimizes periodicity arraying effects
and provides uniform coverage. Aperiodic modulation of a single asymmetric base shape allows infinite,
seamless tiling and unlimited shapes are possible with different tiling patterns. The Waveform™ Bicubic represents
the next generation in acoustical canopy design. No other system provides the aesthetic and performance
benefits in a painted, Class A, glass reinforced gypsum system.
Problem
When multiple spaced canopy panels are used in an array, the scattering response or coverage
is the combination of the response of a single panel and the periodic arrangement. Periodicity results
in scattering in preferred directions, which depend on the array configuration. The sound level in these
preferred diffraction directions depends on the uniform scattering capability of each individual panel.
As a result, coverage is often compromised unless optimization is utilized.
Solution
To solve this problem, RPG developed the first Shape Optimization™
program, which automatically determines the best shape and
array of curve optimized surfaces to insure uniform coverage. The Shape Optimizer™ combines
the power of the boundary element and multi-dimensional optimization
techniques, incorporating the diffusion coefficient as the metric
of optimal performance. The aperiodically mounted Waveform™ Bicubic shapes can provide optimal ensemble
for musicians on stage and uniform coverage in the audience.
Diffusion
The random incidence acoustical data illustrates how the Waveform™ Bicubic G provides useful sound diffusion
in the lower midrange through the higher frequency range. The chart displays the random incidence diffusion coefficient,
as determined according to AES-4id-2001 from the autocorrelation of the 1/3 octave polar responses for incidence angles of 0, +/-30 and +/-60
degrees, the correlation scattering coefficient for computer modeling calculations and the A-mount absorption coefficient for reference.
Modulation
RPG’s patented Aperiodic Modulation of a Single Asymmetric Base Shape allows the
creation of wide area coverage seamlessly with a single asymmetric base shape, thus minimizing
periodicity effect. This is possible, because the asymmetric central shape (top), morphs to identical sides,
which have a zero gradient allowing adjacent tiles to seamless
transition without discontinuity in any orientation (middle) forming a larger aperiodic array
(bottom 4x4 array). Thus with an optimized aperiodic array, canopy performance can finally be
mathematically determined and evaluated. The performance of the aperiodic array can be improved beyond that of a single acoustically optimized canopy elements.
Installation
For ceiling suspension, an embedded stainless steel cleat
is provided to capture a wire cable. For wall mounting, a wooden cleat
is provided. Units may be custom configured for downlighting, contact RPG or your local representative for more information.
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Home:
Products:
Waveform™
Bicubic G;
The
First Curve Optimized Two Dimensional Bicubic Sound Diffuser From
The Acoustical Industry’s Leading Innovator
| Features
& Benefits |
Features
Two Dimensional Curve Optimized
shape
Ability to optimize
array and positioning
Integrated
mounting hardware
Seamless
tiling in both directions
Meets Class A fire safety codes
Benefits
Curve optimized
shape insures uniform coverage
RPG provides
optimal arraying and tilting to insure uniform coverage and
eliminate guess work in the field
Adjacent
panels can seamlessly tile for wide area coverage simulating a
single canopy element
Bicubic
panels and be used independently or tile side to side and
front to back for wide area application
Can be used in all applications
requiring a Class A fire rated material
Installation
is quick and easy.
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Copyright
2000, RPG Diffusor Systems, Inc.