频谱分析仪作业，照着下载的资料做的，功能都可以实现，录音时如果信号不满足过零检测法的条件会出现错误，如果可以的话自己录制声音。-Spectrum analyzer operation, done according to the downloaded data, functions can be achieved, recording zero if the signal does not meet the conditions of detection error, if possible,

基于MATLAB的简易声音信号频谱分析仪设计源码及设计报告。可以实现音频信号的不同频段滤波。-MATLAB simple voice signal spectrum analyzer design source code and design reports. Can achieve a filtering of the different frequency bands of the audio signal.