Cymatics and Bjork

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If you look Cymatics up on the interwebs you will find the following definition: Cymatics (from Greek for “wave”) is the study of visible sound and vibration, a subset of modal phenomena where 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. [1] Different patterns emerge in the excitatory medium depending on the geometry of the plate and the driving frequency. – wikipedia.