Cymatics is the study of visible sound co vibration, a subset of modal phenomena.
It’s the process of visualizing sound. A guy named Robert Hooke discovered something interesting when he ran a bow across a glass plate with flour on it. He discovered nodal patterns aka Cymatics. These are unique patterns for a specific frequency of vibration through a particulate medium.
Artist Nigel John Stanford uses this phenomena in a track called “Solar Echos” to create an awesome visualization for the song.
Try it yourself HERE: