Speaking Drawing from Michael T. Bullock on Vimeo.

The artist explains the process: In “Speaking Drawing,” a series of watercolor paper cards and 2″x3″ art boards are placed in a large loudspeaker lying on its back on the floor. A very low, slowly changing tone is played through the speaker, causing the objects to bounce and shimmy around inside. I then drip India ink on the papers and blocks and attempt to draw on them as they quiver uncontrollably.

Bron: http://www.kerismith.com/blog