Under the impact of a large hammer, a high signal noise ratio of the force and velocity can be acquired in the high-strain dynamic testing. 高应变动力试桩法采用数吨重锤锤击，同时实测了桩顶的力信号和速度信号，具有很高的信噪比。
With this filter, the signal-to-noise ratio of a MCG is improved to the intrinsic noise level. 利用它可以使心磁信号的信噪比提高到器件的本徵噪声水平。
