Research Article
Experimental Study on Influence of Borehole Arrangement on Energy Conversion and Acoustic Characteristics of Coal-Like Material Sample
Table 3
Wavelet packet component reconstruction signal spectrum range.
| | The serial number of components | Wavelet packet component | Frequency range (kHz) |
| | 1 | (3, 0) | 0∼46.875 | | 2 | (3, 1) | 46.875∼93.75 | | 3 | (3, 3) | 93.75∼140.625 | | 4 | (3, 2) | 140.625∼187.5 | | 5 | (3, 6) | 187.5∼234.375 | | 6 | (3, 7) | 234.375∼281.25 | | 7 | (3, 5) | 281.25∼328.125 | | 8 | (3, 4) | 328.125∼375 |
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