基于Matlab的不同数字滤波器对语音信号的去噪效果

摘要

基于 Matlab软件平台研究了不同的数字滤波器对污染的语音信号的去噪效果。对比了加入噪声前后的语音信号的时域与频域图。仿真实验结果表明：4种滤波器中切比雪夫 I型滤波器对加入噪声后的语音信号的去噪效果最佳，且成功滤除了高频噪声。%Having Matlab based to investigate different digital filter’s effect in de-noising voice signals was implemented and the time domain and the frequency range charts before and after introducing the noise were compared.Simulation results show that,the Chebyshev Ⅰ filter of four filters has best effect in de-noising voice signals and the high-frequency noise there can be filtered completely.