| Formants | Before prosthesis | After prosthesis | After modified prosthesis |
| f0 | 367.49 | 354.28 | 355.3 |
| f1 | 1124 | 1043.57 | 1268.08 |
| f2 | 1878.26 | 1785.19 | 1657.67 |
| f3 | 2670.95 | 2442.34 | 2186.18 |
| f4 | 3474.88 | 4032.67 | 3696.88 |
| f5 | 4980.91 | 4730.52 | 4828.18 |