I know this isn’t exactly related to Creative Music Technology, but i think it’s cool enough to be on my blog.
While working ‘Warning’ (drum and bass club) i noticed the process of ‘Cymatics’ at work. Cymatics is the study of visible soud and vibrations. I managed to get a video (albeit rather low quality), of the drip tray under our beer pumps, reacting to the sub-bass frequencies. It may not be completely clear but certain frequencies caused the surface of the water to ripple in a set of almost perfect squares. Other shapes and configurations can appear relative to differing frequencies and amplitude.
Here is a better video describing and demonstrating Cymatics