8. Discrete Fourier Transform Demos - MATLAB 1

specgramdemo provides interactive control of the important parameters that define a spectrogram.


  • Change window length and window type
  • Change window overlap
  • Change FFT length (zero padding)
  • Show 1-D slice of spectrogram
  • Plot options: zooming, 30, 40, 50 and 60 dB magnitude ranges, four color maps
  • Three signal types: Sum of sinusoids, Linear chirp, Recorded signal, e.g., speech