for munkong's speaker...

For your studio project, have a look at how (non-Newtonian) fluids (for shapes, ephemeral sculptures) or even sand laid on a plane surface (for patterns) are shaped by the sound vibrations created by a speaker in use. 

Do the experiments yourself and document it for Monday. 

The idea of relating it to the soundbooth drawing is still very promising.

And this will be a lot easier and interesting to draw than the tiny and very subtle vibration of the speaker's membrane.