Cymatics. The Cool Science They Never Taught You In High School.
Musician Nigel Stanford is a well-known New Age and ambient-dub music composer from New Zealand. In this video, he uses a Chladni plate, a horse pipe, a speaker dish, ferro fluid, a plasma ball, a Ruben’s tube, and a Tesla coil to demonstrate the visible effects of sound and vibration.
Source: Nigel Stanford