This is an excellent video made by Suzanne Tribe, a student over at the School of Cymatics.
She built a homemade tonascope using PVC (like in these diy cymatics instructions), then invited a friend to sing Mozart’s “Una Donna a Quindici Anni” through the pipe. Watch this video to see how they achieved some beautiful and complex cymatics images using a very simple setup.
Nice work, Suzanne! You can view Suzanne’s page at the School of Cymatics here. To get free instructions for building your own diy cymatics tonascope click here.