I am not an astrologer or astronomer (I am but a musician-composer and sound engineer with a keen interest in this subject). This article is in the first place written for musicians that - like myself - are intriqued by this topic and perhaps for some astrologers it might turn out to be an interesting read as well.
I do welcome additional info, suggestions and corrections (in case of mistakes made in this article). Thank you!
Cymatics is the study of visible sound and vibration. Typically the surface of a plate, diaphragm, or membrane is vibrated, and regions of maximum and minimum displacement are made visible in a thin coating of particles, paste, or liquid.