A Chladni plate is used to visualize standing wave patterns on a vibrating surface. Sand or salt is sprinkled on a horizontal metal plate, which is then excited by a bow or a mechanical vibrator. The vibrations cause the sand to accumulate at the nodal lines where no motion occurs, creating intricate and visually striking patterns. These patterns demonstrate the resonance modes of the plate and the fundamental principles of wave interference and vibration.

Chladni Plate Resonance Frequencies

Circular Plate (Hz)	Square Plate (Hz)	Violin Plate (Hz)
180.7 (Single Inner Ring)	116.1	195
186 (Circular Islands in a ring)	439.6	237
246 (Single Outer Ring)	463.9	253
322 (Single Outer Ring w/ inner Island)	510.6	320
440 (Double Ring)	590.24	337
540 (Double Ring where outter ring is a double)	612.3
761.7 (Sunburst)	627.2
924.1 (Triple Ring)	1002.7
991.2 (Plus Symbol)	1255.2
1010 (Triple Ring with curvy ring)	1655.5
1135 (Radiation Symbol / baseball (very cool)0	1729.8
1646.7 (Asterisk shape)	2032
1742.4 (Quadruple ring)	2120.5
1901.1 (Sundial)	2157.6
2063.6 (Cross Hairs)	2208.6
2794.4 (Quintuple Ring)	2282.8
3261.6 (Cross Hairs with extra ring)	2478.8
3914.2 (Triple ring with closed shapes on outside)	2494.4
4540.6 (Spider Web)	2662.5
5959.2 (Sixtuple Ring)	2761.5