Amazing idea for a project Carl.
The way I see it you have two routes.
- 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 .
- 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@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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