are used on the walls and ceilings in auditoriums to blend the direct
reflected sound, increasing speech intelligibility and
musical clarity and intimacy. Traditionally,
flat panels or arcs have been used and their placement has
either aesthetic or based on geometrical optics. If not
designed and arrayed, objects can provide uneven coverage,
typically exemplified in minima and maxima in the sound
level. In addition, these simple shapes can be
to a loss in low frequency sound. To solve this problem,
the Waveform™ Spline - a curve optimised one dimensional
that provides uniform coverage in the area of use.
Flat panel arrays on walls and ceilings provide uneven sound pressure levels. Coverage can be improved by curving or shaping the panels, but there is no guarantee that optimum results will be obtained and consequently uneven response is often experienced.
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 Waveform™ Spline provides optimal ensemble for musicians on stage and uniform coverage in the audience.
The random incidence acoustical data illustrates how the Waveform™ Spline W provides useful sound diffusion in the lower midrange through the higher frequency range. The chart displays the mean diffusion coefficient, which is the normalized standard deviation of the 1/3 octave polar responses for angles of incidence between 0° and 90°, the normalized scattering coefficient for computer modeling calculations and the A-mount absorption coefficient for reference.
A metal thimble is provided to capture a wire cable through the holes provided in the ribs at the rear of the panel.