| Percentage [%] | Sound speed at 6% cement [m/s] | |
| Sawdust of mahogany | Chips of mahogany | |
| 2% | 1890.67 | 1672.29 |
| 4% | 1689.60 | 1695.02 |
| 6% | 1688.53 | 1707.84 |
| 8% | 1601.21 | 1697.50 |