The videos edited together here are from a one day course which I took in Queen's University Belfast's Institute of lifelong learning, called Exploring Sound Phenomena.
It was a fascinating exploration of how sounds could be made to manifest themselves in the physical world, based upon experiments that were carried out by a few individuals, mostly around the turn of the 20th century in the UK and France. The course was attended by those with a background in the visual arts, musicians, and scientists.
The first experiment shown in this video is a piece of brass that has been sprinkled with sand and then played with a violin bow. The geometric shape forms in front of your eyes, and it's pretty amazing to watch.
The other experiments included singing into the base of a specially constructed drum, and using different shaped plates and materials, including lycopodium spores to achieve ever more impressive results and patterns.