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Parabolic - Why Spherical and not flat curve?

Subject: Parabolic - Why Spherical and not flat curve?
From: "picnet2" picnet2
Date: Thu Nov 27, 2008 4:12 pm ((PST))
Play with the ripple tank simulator:-

Select Setup: Parabolic Mirror 1, increase the resolution to max if you have a 
fast machine.
then move the sound source around and observe what happens.

Then  choose:-
Setup Circle: and chance the mouse "edit waves" to "edit walls", remove half of 
circle. (This becomes your dish) 

And move the source around, or move it to the top. Adjust the source 

What did you observe?

Playing with the simulator should keep you focused .-)


--- In  "John Tudor" <> wrote:
> --- In  "Roger.Norwood"
> <roger.norwood@> wrote:
> > I'm sure the math's will be tortuous but perhaps the question could
> be re-phrased.
> The maths is easy, but phrasing it short enough to be the subject line
> isn't quite so....

"While a picture is worth a thousand words, a 
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause

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