| Diffusion Coefficient | ||
| Hz | Golden Pyramid | Reflector |
| 125 | 0.76 | 0.75 |
| 160 | 0.75 | 0.74 |
| 200 | 0.76 | 0.75 |
| 250 | 0.81 | 0.78 |
| 315 | 0.84 | 0.81 |
| 400 | 0.83 | 0.78 |
| 500 | 0.75 | 0.63 |
| 625 | 0.85 | 0.39 |
| 800 | 0.77 | 0.47 |
| 1000 | 0.78 | 0.45 |
| 1250 | 0.75 | 0.25 |
| 1600 | 0.67 | 0.27 |
| 2000 | 0.58 | 0.29 |
| 2500 | 0.40 | 0.25 |
| 3150 | 0.33 | 0.15 |
| 4000 | 0.31 | 0.16 |