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This java applet is a simulation of waves in a circular membrane (like a drum head), showing its various vibrational modes. To get started, double-click on one of the grid squares to select a mode (the fundamental mode is in the upper left). You can select any mode, or you can click once on multiple squares to combine modes.

Explanation how to use the Circular Membrane applet.

Acknowledgement: This applet is courtesy of Paul Falstad.

Version 1.6a, posted 21/11/05