FACT 7: Making Art with Sound
There actually is a way that you can perceive sound waves, and it doesn't involve some silly-looking glasses from The Magic School Bus. It simply requires a transfer of the waves into a visible medium. If you were to oscillate a plate covered in small particles (like sand), you would see that sound waves create patterns, which can be used to make incredible symmetrical art. The study of those patterns is called Cymatics. One of the first observers of this natural curiosity was Galileo in 1632, who was amazed to discover that the particles on a plate formed parallel lines when he scraped it with a chisel, which produced a hissing noise.