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比例波形f(2t)f(t/2)的matlab Fourier变换_Matlab - Fatal编程技术网

比例波形f(2t)f(t/2)的matlab Fourier变换

比例波形f(2t)f(t/2)的matlab Fourier变换,matlab,Matlab,计算上述三个声波的fft, 根据傅里叶变换的性质,f(2t)-1/2F(w/2)f(t/2)-2F(2w) 但是当我绘制星等谱时,f(2t)的星等不是f(t)的两倍 为什么 [audioIn,fs] = audioread("1.MP3"); %f(t) audioOut = stretchAudio(audioIn,2); %f(2t) audioOut2 = stretchAudio(audioIn,0.5); %f(t/2)

计算上述三个声波的fft, 根据傅里叶变换的性质,f(2t)-1/2F(w/2)f(t/2)-2F(2w) 但是当我绘制星等谱时,f(2t)的星等不是f(t)的两倍 为什么

[audioIn,fs] = audioread("1.MP3");  %f(t)
audioOut = stretchAudio(audioIn,2);  %f(2t)
audioOut2 = stretchAudio(audioIn,0.5); %f(t/2)