To continue with my latest obsession over room modes I have been thinking up ideas for how you could potentially visualize the modes in a space. I was wondering if there would potentially be enough air displacement with a large subwoofer that it could potentially move a substance such as fog from a fog machine into the peaks and troughs of the wave. I borrowed a fog machine to test this thought. Within a few seconds of turning the fog machine on the room filled with fog.

The experiment was inconclusive as fog tends to fill the room and makes it hard to observe anything more than the fog in front of your face. I would like to further experiment with other mediums such as with dry ice or bubbles.