Application of Boundary Local Feature Scale Adaptive Matching Extension EMD Endpoint Effect Suppression Method in Blasting Seismic Wave Signal Processing

Table 2

The natural frequency corresponding to the first eight-order mode shape (unit: Hz).

Array	Natural frequency
1	8.234
2	13.806
3	18.806
4	25.023
5	29.920
6	32.156
7	42.714
8	44.976