eigendrum

Eigendrum is an interactive web application that simulates drumhead vibrations by solving eigenvalue problems to calculate the frequencies and modes of vibration for custom drum shapes. Users can draw their own drum outlines or generate them from equations, then strike virtual drumheads at different points to hear how the resulting sound changes based on impact location and drum geometry. The tool uses finite element methods to numerically compute overtone ratios with high accuracy, allowing exploration of how drum shape, size, tension, and material affect sound.