Dr. Sir Peter Guy Manners, a British medical doctor and osteopath, developed the fundamental principle* of Cymatics and set numerous precedents for alleviating ailments by conducting research on the notion that each internal system within a healthy living organism emits specific frequencies of compound harmonic sounds in order to shape and maintain itself.
Namely from observing that different regions of the body varied in their response to each sound wave/frequency, he was able to identify the locations via responses/resonances. Furthermore Dr. Manners’ research revealed that the sound consisted of not one, but multiple frequencies, which was verified through actual practice.
* The theory that sound has the property of generating a force field that can create geometric patterns (actually demonstrated by Swiss physician and natural scientist, Dr. Hans Jenny).