WAVES & SOUND · LAB 17

Chladni plate patterns

Vibrate a plate at its resonant modes and watch virtual sand migrate towards stationary nodal lines.

MODE(2, 3)

normal mode

NODAL FRACTION0%

sand near nodes

RESONANCE240 Hz

selected drive

PARTICLES3000

WHAT TO NOTICE

Vibration draws geometry

Sand is thrown away from strongly moving antinodes and settles where the plate barely moves. Each resonant mode creates a different network of nodal lines.

Φmn = sin(mπx) sin(nπy)