One of my husband’s good friends (and mine too) is Mike Bullock (a genius artist and experimental musician). He has done a series of Speaker Drawings. The results are beautiful. He 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.
[filed under "why didn't i think of that?"]