Research Article
Research on Sound Source Material Recognition Technology in Indoor Geotechnical Inspection
Table 3
Statistical table of correlation analysis between different compaction of soil samples and subband spectral centroid under different hammering forces.
| | Serial number | Plan hammering force (N) | Measured hammering force (N) | Soil compaction (%) | Correlation equation | Correlation coefficient | Subband spectrum centroid (Hz) |
| | 1 | 35 | 35(L) | 76.6~97.9 | | 0.61 | 1519~3018 | | 2 | 45 | 45(L) | 76.6~100 | | 0.67 | 1518~3038 | | 3 | 55 | 55(L) | 76.6~100 | | 0.81 | 1657~2920 | | 4 | 65 | 65(L) | 80.3~100 | | 0.71 | 1723~3115 | | 5 | 75 | 75(L) | 83.5~100 | | 0.67 | 2118~3040 | | 6 | 85 | 85(L) | 87.2~100 | | 0.58 | 2031~3127 |
|
|
