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Frequency band range of layer 3 nodes after wavelet packet decomposition.
| Frequency Band Number | Node Number | Frequency Range (kHz) |
|---|---|---|
| 1 | 7 | 0~62.5 |
| 2 | 8 | 62.5~125 |
| 3 | 10 | 125~187.5 |
| 4 | 9 | 187.5~250 |
| 5 | 13 | 250~312.5 |
| 6 | 14 | 312.5~375 |
| 7 | 12 | 375~437.5 |
| 8 | 11 | 437.5~500 |
