本文件包含两个MATLAB程序。两个程序分别设计了切比雪夫1型低通滤波器和切比雪夫1型带通滤波器，实现特定频率信号的滤除。-This document contains two MATLAB program. Both programs were designed Chebyshev a low pass filter and Chebyshev type band-pass filter to filter out specific frequency signals to achieve.

Import data files as input parameters matlab program is running, Based chebyshev underwater acoustic signal analysis, Course designed to prepare the matlab program code.

Based chebyshev underwater acoustic signal analysis, Application of small area variance comparison, simple procedures, D-S evidence theory data fusion.