The
performance of a scattering surface is characterized by the diffusion
coefficient, which is the standard deviation of the 1/3 octave angular
response, shown above at 12.5 kHz. The graph illustrates how uniformly
the BAD™ Panel scatters sound across the frequency spectrum, compared
to a reflective panel, for normal incidence.
| Diffusion Coefficient | ||
| Hz | BAD Panel | Reflector |
| 630 | 0.31 | 0.40 |
| 800 | 0.49 | 0.55 |
| 1000 | 0.61 | 0.56 |
| 1250 | 0.66 | 0.47 |
| 1600 | 0.65 | 0.43 |
| 2000 | 0.51 | 0.37 |
| 2500 | 0.40 | 0.34 |
| 3150 | 0.41 | 0.31 |
| 4000 | 0.42 | 0.31 |
| 5000 | 0.55 | 0.25 |
| 6300 | 0.52 | 0.12 |
| 8000 | 0.43 | 0.09 |
| 10000 | 0.49 | 0.11 |
| 12500 | 0.47 | 0.00 |
| 16000 | 0.38 | 0.00 |
| 20000 | 0.28 | 0.00 |
Diffusion
Coefficients
|
| Copyright 2000, RPG Diffusor Systems, Inc. |