观测实时模拟信号（语音）的频谱 用音频设备采集一段语音，将语音存为.wav格式。对wav文件作分段傅里叶变换分析。语音是分音节的，应把它分段分析，而且实际运用中的数字信号处理的FFT的点数是有限的，一般只能达到千点。用傅里叶反变换IFFT，从频域恢复信号。画出频谱图和语音波形图。 -Observing real-time analog signal (voice) of the spectrum collected with the audio devices section of

matlab实现加汉明窗，矩形窗，并对它们进行傅里叶变换，并实现频谱的分析。-matlab realize Jia Hanming window, rectangular window, and they are subjected to Fourier transform, and to achieve the analysis of the frequency spectrum.

使用matlab合成音乐，用傅里叶级数或傅里叶变换的方法来做，最后用分析得到的吉他的特性来演奏东方红-Matlab music synthesis, using Fourier series or Fourier transform method .And finally use the guitar features formerly analysised to play with DFH

导入声音文件，进行快速傅里叶变换，得到声音的频谱。(Import audio files, fast Fourier transform, to get the spectrum of sound.)

根据短时傅里叶变换原理，计算并显示该语音段的短时幅度谱和功率谱；根据语谱图显示原理，编程实现该语音段语谱图的计算和显示，并尽量多地分析出语谱图包含的语音特征信息,用MATLAB提供的倒谱计算函数，显示该语音段的复倒谱和倒谱(According to the principle of short-term Fourier transform, the short range spectrum and power spectrum of the speech segment are calculat