cymatics

The concept of underlying vibrational patterns in the natural world dates back centuries. In his 1632 volume, "Dialogue Concerning the Two Chief World Systems," Galileo Galilei observed the frequency phenomenon while scraping a brass plate with a chisel. He noted a high whistling sound and saw parallel streaks of brass particles that assembled in unison with the sound.

Geometry Matters -

The concept of underlying vibrational patterns in the natural world dates back centuries. In his 1632 volume, "Dialogue Concerning the Two Chief World Systems," Galileo Galilei observed the frequency phenomenon while scraping a brass plate with a chisel. He noted a high whistling sound and saw parallel streaks of brass particles that assembled in unison with the sound.

Geometry Matters - https://geometrymatters.com/hans-jenny-and-the-science-of-sound-cymatics/