建立一个简单的语音信号加噪去噪系统。先录入语音，进行频谱分析，再分别对加噪语音信号和去噪之后的信号进行频谱分析。(A simple speech signal denoising system is proposed. First input the speech, carry on the frequency spectrum analysis, and then carry on the frequency spectrum analysis to the noisy speech sign