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Application of wavelet threshold denoising method in signal preprocessing for blast vibration

The blast vibration signal, as the key parameter to evaluate the blasting vibration, is often disturbed by the outside noises. The method of signal denoising based on wavelet threshold was applied to eliminate their negative effects, and different thresholds and noises treatment methods were described in detail. The effects of denoising using different thresholds were compared and analyzed by processing the blast vibration signal recorded in engineering work. Some practical experiences about wavelet denoising were summarized.