Chris' Page on Aliasing using MatLab
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Demo of Aliasing Using Matlab
Frequencies above half the sample rate will produce aliasing. This should appear as a lower frequency signal.
Below is a spectrogram of a quadratic sweep from 20 Hertz to 20,000 Hertz using a 441000 Hertz sample rate.
Currently the Y-Axis frequency scale is wrong, the max should be 20,000.
This one is the same script and parameters except the sample rate has been changed to 8000 Hertz.
File:Chirp8000.jpg
