有井曲线作为输入可计算其地震波的衰减,基于互功率谱的时延估计，比较了软阈值，硬阈值及当今各种阈值计算方法。- There is a well attenuation curve as input to calculate its seismic waves, Based on the time delay estimation of power spectrum, Comparison of soft threshold and hard threshold and today various threshold calculation method.