Cymatics: Demonstration using salt
Cymatics is the study of the effects of sound waves on physical items. Such as water or in the case of the video above, salt. The amazing thing is the patterns formed in the loose salt by nothing but the sound waves. The sounds in the video are actually pretty jarring. So you may want to keep the volume on your speakers on low.Via Neatorama: The Effect of Sounds Waves on Salt
Very interesting presentation but only the begining. I am certain that the square base has a lot to do with the patterns formed. How about a round or some other polygon shape. Maybe even an irregular polygon. One would need to track the pattern for each of many frequencies through a large volume range. Also it might be interesting to see it done in a vaccuum where the only contact was through the vibration of the base versus the air. Or one could do it all within an atmosphere of varying densities of air or any of a number of other gases.
again. Very interesting. Thanks for demonstrating it for us.
D.R.Bingham