Rectangular Window Causing High Frequency

This topic has 1 reply, 2 voices, and was last updated 7 years, 10 months ago by Simon.

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- September 29, 2016 at 22:56 #5056
  Xiao Z
  Student
  Why there will be two super high frequencies column shown on the spectrogram when using rectangular window?
- September 30, 2016 at 08:18 #5057
  Simon
  Professor
  You are seeing the artefacts caused by the discontinuity at the edges of the window.
  
  The “columns” are the spectra at the start and end of the window. They are not “super high frequency” – what you are seeing is energy across all frequencies.
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