Filtering

[Vincent Kars]

Paul Falstad wrote an applet demonstrating how different filters affect the spectrum and the impulse response using various signals.



http://www.falstad.com/dfilter/

 

[amirm]

Cool!

 

[Vincent Kars]

He has a lot more: http://www.falstad.com/mathphysics.html
I like the Fourier: http://www.falstad.com/fourier/