Evan Grant demonstrates the science and art of Cymatics, a process for making sound waves visible. Useful for analyzing complex sounds (like dolphin calls), cymatics also raises some philosophical questions with the correlation between high frequencies and complex shapes. 

Cymatic Shapes with Sound & Water

Cymatic Shapes with Salt on a Metal Plate

Vibrating a metal plate with sand creates wave patterns such as concentric circles. The higher the frequency, the more complex the shapes produced, with certain shapes having similarities to traditional mandala designs.

Cymatic Rotation

Dr. Hans Jenny in his studies, demonstrates rotary movement controlled by frequency.

vibration