| Wood Type | Condition | Distance (mm) | Frequency (kHz) | ||||||
| 1 | 3 | 5 | 7 | 9 | 11 | 13 | |||
| Softwood | N | 20 | −33.2 | −36.5 | −60.0 | −75.6 | −78.3 | −79.2 | −79.8 |
| 40 | −34.4 | −36.2 | −56.9 | −75.1 | −78.3 | −79.4 | −79.8 | ||
| 60 | −39.7 | −41.0 | −54.0 | −76.3 | −78.0 | −79.3 | −79.8 | ||
| 80 | −43.4 | −36.4 | −64.2 | −77.4 | −78.5 | −79.3 | −79.9 | ||
| 100 | −43.6 | −43.6 | −55.1 | −77.4 | −78.4 | −79.4 | −79.8 | ||
| C | 20 | −32.5 | −35.0 | −60.1 | −73.7 | −72.8 | −75.3 | −75.8 | |
| 40 | −32.4 | −39.0 | −59.5 | −73.1 | −73.5 | −75.3 | −75.7 | ||
| 60 | −29.5 | −33.5 | −59.7 | −73.5 | −74.8 | −75.8 | −76.3 | ||
| 80 | −32.3 | −36.0 | −61.4 | −73.0 | −74.5 | −75.2 | −75.8 | ||
| 100 | −35.6 | −49.3 | −60.2 | −73.4 | −74.4 | −75.2 | −75.7 | ||
| H | 20 | −24.9 | −39.5 | −58.2 | −72.4 | −72.7 | −75.1 | −75.7 | |
| 40 | −34.1 | −41.6 | −60.0 | −73.6 | −74.6 | −75.3 | −75.9 | ||
| 60 | −31.4 | −45.0 | −57.5 | −73.5 | −74.1 | −75.2 | −75.7 | ||
| 80 | −30.9 | −41.1 | −64.1 | −73.4 | −74.4 | −75.3 | −75.6 | ||
| 100 | −30.2 | −31.7 | −56.3 | −72.7 | −73.9 | −75.3 | −75.7 | ||
| L | 20 | −18.8 | −40.6 | −52.0 | −73.7 | −74.8 | −75.7 | −76.0 | |
| 40 | −20.6 | −35.3 | −60.9 | −74.0 | −74.6 | −75.7 | −76.0 | ||
| 60 | −20.0 | −36.3 | −53.5 | −74.0 | −74.1 | −75.6 | −76.0 | ||
| 80 | −27.9 | −44.3 | −54.5 | −74.3 | −74.6 | −75.7 | −76.1 | ||
| 100 | −30.7 | −35.8 | −61.5 | −73.9 | −74.9 | −75.6 | −75.9 | ||
| M | 20 | −22.8 | −37.1 | −47.7 | −72.8 | −73.2 | −75.4 | −75.8 | |
| 40 | −26.5 | −47.3 | −49.5 | −73.6 | −73.7 | −75.3 | −75.9 | ||
| 60 | −24.7 | −47.3 | −62.8 | −74.0 | −74.2 | −75.4 | −75.8 | ||
| 80 | −27.4 | −41.4 | −53.7 | −73.9 | −74.8 | −75.4 | −75.8 | ||
| 100 | −27.2 | −38.4 | −54.6 | −73.7 | −74.3 | −75.4 | −75.7 | ||
| Hardwood | N | 20 | −29.5 | −43.5 | −65.4 | −73.2 | −74.5 | −75.3 | −75.7 |
| 40 | −26.8 | −39.4 | −68.8 | −72.8 | −74.4 | −75.1 | −75.6 | ||
| 60 | −29.6 | −40.7 | −65.4 | −73.7 | −74.6 | −75.2 | −75.7 | ||
| 80 | −28.4 | −35.7 | −66.9 | −73.1 | −74.5 | −75.3 | −75.6 | ||
| 100 | −34.5 | −53.1 | −69.6 | −73.6 | −74.5 | −75.3 | −75.8 | ||
| C | 20 | −29.6 | −38.9 | −51.0 | −67.6 | −71.0 | −74.0 | −75.8 | |
| 40 | −37.1 | −37.2 | −47.5 | −64.5 | −68.3 | −74.8 | −75.9 | ||
| 60 | −49.4 | −38.8 | −56.2 | −69.8 | −74.2 | −75.5 | −75.8 | ||
| 80 | −45.1 | −34.6 | −53.0 | −69.9 | −70.1 | −75.2 | −75.9 | ||
| 100 | −36.3 | −40.0 | −62.8 | −71.1 | −74.3 | −75.4 | −75.9 | ||