Research Article
Research on Sound Source Material Recognition Technology in Indoor Geotechnical Inspection
Table 4
Correlation table between the same level of hammering force and different compaction of soil samples and the subband spectrum centroid mean value.
| Serial number | Hammering force (N) | Soil compaction (%) | Correlation equation | Correlation coefficient | Subband spectrum centroid mean (Hz) |
| 1 | 35(L) N | 76.6~ 97.9 | | 0.79 | 1987~2883 | 2 | 45(L) N | 76.6~100 | | 0.96 | 1937~2713 | 3 | 55(L) N | 76.6~100 | | 0.96 | 1948~2783 | 4 | 65(L) N | 80.3~100 | | 0.97 | 1877~2697 | 5 | 75(L) N | 83.5~100 | | 0.94 | 2118~2790 | 6 | 85(L) N | 87.2~100 | | 0.67 | 2397~2808 |
|
|