Sounds audible to humans are, as we have seen, essentially, spherical in form and invisible under normal circumstances. Using the emergent science of cymatics it is possible to image sound wherein we are able to obtain an analog of the sound samples periodicities in a form that permits close study. Imaging sounds cymatically requires a membrane on which the periodicities can be made visible, such as thin latex or the surface tension of water, typically captured by a still or video camera. Early experiments with latex, using fine particulate matter as the disclosing medium, showed fairly course detail in the geometry of the resulting CymaGlyphs. The surface tension of water is now the preferred medium onto which sounds may be imprinted, revealing their structure with fine detail and even revealing some 3D data.
Via Sloppy Unruh