Frequency Cymatics · history
Chladni figures: the classic sand patterns
Ernst Chladni’s plate experiments and why nodal lines appear.
What is measured
When a plate vibrates in a normal mode, sand gathers on nodal lines (minimal vertical motion). Different modes = different symmetric figures. Foundation of experimental acoustics.
What is claimed
Often shown as “geometry of creation.” Appreciate the physics demo first; symbolism second.
Related
Editorial dual-lens guide. Physics and history first; myth as myth. Not medical advice.