| Frequency | Aluminum 1 | Aluminum 2 |
| fw, (Hz) | 1733 | 432 |
| f1, (Hz) | 2050 | 370 |
| f1d, (Hz) | 2081 | 344 |
| fH, (Hz) | 1021 | 752 |
| f2, (Hz) | 880 | 895 |
| f2d, (Hz) | 850 | 945 |