You'll need a computer with a microphone to try this. You vary your voice volume to create different kinds of lines. For example, high volume makes the line turn clockwise, low volume makes it go counterclockwise, and medium volume makes it go straight. The drawing begins at the center.
Ze Frank would love to hear back from you with the results of this tool, which is still in beta.
From the Upcoming ueue, submitted by Marilyn Terrell.
http://dirtypotatoes.tumblr.com/post/74724606/this-was-made-using-frank-zes-voice-draw-beta