**Date:** Tue Jul 17 16:46:10 2007

**Author:** Scott Shelley

**Subject:** Quantitative Chladni Plates experiments?

**Post:**

Hi all,

We're interested in implementing an experiment in which students

mathematically predict the patterns on circular and square Chladni

plates, then perform the experiment to compare their results with

their predictions.

The problem? The theoretical results (as outlined on the web - I

haven't done them myself) are tabulated on this page:

http://local.wasp.uwa.edu.au/~pbourke/surfaces_curves/chladni/. (Can

anyone verify the correctness of these calculations?)

The actual patterns produced on our square Chladni plate when driven

at various resonance frequencies are beautiful, but they don't agree

with these predictions. While there are some similarities between

this theory and our experiment, we were hoping to get a better match.

Does anyone do an experiment of this nature and, if so, would you be

willing to share how you do it?

Thanks very much,

Scott.