2D Drum Modes
Circular drum: Bessel eigenmodes J_m(χ_{mn}r/R)cos(mθ), Chladni nodal patterns
(0,1)
Mode (m,n)
—
Frequency (rel)
0.0
Time
off
Superposition
Select mode (m,n) — angular, radial nodes
Wave speed c
1.0
Mix mode 2 amplitude
0.0
Mode 2
(1,1)
Chladni view
Run
Reset
+
−
nodal (Chladni)
J_m(χ_{m,n} r/R)cos(mθ)cos(ωt). Zeros of J_m give nodal circles; azimuthal index m gives nodal diameters. Chladni patterns: sand collects at nodes. Superpose two modes to create complex beating patterns.