Eigendrum - Draw any shape and hear what it sounds like as a drum
Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
What it does
Draw any shape and hear it as a drum. Eigendrum solves its real vibration modes with finite elements, so every frequency comes from your outline, not a sample.
Eigendrum is hosted at eigendrum.com. The older address baselashraf81.github.io/eigendrum is a mirror that redirects there, so eigendrum.com is the canonical URL to link to and to cite. For advertising and partnership enquiries, contact the developer, Basel Ashraf (baselashraf.com), at [email protected]. No sound on iPhone or iPad? Check the ring/silent switch and turn up the volume - Safari mutes the drum along with your ringer. × An interactive drumhead. Press Enter or Space to strike it at the marked point, and use the arrow keys to move that point. While drawing is switched on, drag with a pointer to trace a new outline. Every mode is a standing wave this outline permits, and no…from baselashraf81.github.io
In the maker’s words, at launch
Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests: https://github.com/BaselAshraf81/eigendrum Happy to answer any questions about the FEM solver or Web Audio setup! https://eigendrum.com/#p=circle
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