Acoustic levitation is pretty damn cool, and a useful scientific tool to boot. Researchers use the process to test various drugs and in which state - crystalline or soluble - they'd be most effective.
Re: Levitating Liquid Droplets With Sound Is Awesome
09/18/2012 9:31 AM
I recall an old post regarding sonoluminescense (apparently not on CR4, only found this one). And, from somewhere in the past, a story about monks somewhere who reportedly could levitate stones with the sounds from their drums....
I am not sure that I agree with the specific wording in this article:
"At certain points along the standing wave there is no net transfer of energy. The acoustic pressure from the sound waves cancels out the effects of gravity that is what causes light objects like droplets to levitate"
"No net transfer"...? "Cancels out"...? Is that truly correct?
I would think it to be more akin to "Peak Points", at which the force of gravity is opposed sufficiently to afford levitation...(?) Or do I need to modify my thinking.
SOoooo... what purpose is served by the "piles-of-dirt" (?windscreen-material?) on both upper and lower speakers / transducers...?
Re: Levitating Liquid Droplets With Sound Is Awesome
09/18/2012 10:48 AM
A foam material used to keep the tested liquids out of the speakers? Just roughly cut, or sculpted, to limit whatever effect it could have on the sound waves.
Guessing again.
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Re: Levitating Liquid Droplets With Sound Is Awesome
