[PD] Cymatics/Chladni figures simulation

padawan12 padawan12 at obiwannabe.co.uk
Wed Mar 28 11:48:33 CEST 2007

Amazing idea for a project Carl.

The way I see it you have two routes.

1) Do a full finite element physical model of a circular lamina
and measure the amplitude at many points on the surface. The sand
falls into minima nodes iirc .

2) Cheat. Create the visuals by mapping the known standing
waves of various modes but missing out the "actually building
a physical model" part. 

The latter is more feasible for a real-time simulation, but possibly
more difficult than using the model. You'll need a much better mathematician
than me to help you work out the mapping.

In the worst case you could "sample" the data, do a frequency
sweep and fit an equation to each standing pattern which is
indexed by the frequency input from your voice.

Hope that helps. Imho it's quite a challenging project to pull off,
so best of luck.

On Tue, 27 Mar 2007 15:23:34 +0100
"Carl Knott" <iamfromspacebaby at gmail.com> wrote:

> I'd like to write a simulation of a Cymatic Tonoscope.
> I plan to create a physical model of a circular membrane, sand will
> be sprinkled on top of it. When a person speaks into a microphone
> the membrane will vibrate causing the sand to form standing wave patterns.
> Obviously this will be done in real time.
> Any ideas guys? I really want to write this :)
> All the best,
> Carl.
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