🔔 Swinging Church Bell: Physical Pendulum, Clapper Timing and Partial Tones

A bell on a wheel swings as a large-amplitude physical pendulum (period from an elliptic integral) while its clapper, a coupled second pendulum, strikes only when the swing is big enough; each strike is synthesised from hum, prime, tierce, quint and nominal partials with exponential decay, beating and a missing-fundamental strike note.

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install