Talk:Acoustic levitation
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[edit] Cleanup
I stumbled on this new article this morning. It was a bit of a shambles because it was created by a new user, but I have given it a once-over cleanup. I ask that the user who created this article please read WP:CITE and place footnotes on all the places I have marked with citation tags - I see there are a number of references which are listed, which is good, but personally I am not bothered to read all of them and find out which one says what and where.
Also, if that user could add titles to the references (after the bullet "*" but before the square bracket with the URL link), so that it reads better.
Thanks and enjoy editing Wikipedia, Robinresearch Byrgenwulf 09:57, 25 July 2006 (UTC)
[edit] Image
It'd be cool to find an image that demonstrates this that fits within Wikipedia's fair use guidelines. One option is if someone could get permission from the Otsuka laboratory for one of their images under the GFDL. -- Heptite (T) (C) (@) 22:20, 15 November 2006 (UTC)
[edit] fixed honda link, added descript. 2 that youtube link as well....
I orignally clicked the honda electronics link and found it wasnt working so i searched that website (english ver of course) and got the diagram of what the link tried to hook up the wiki user w/... then i edited the acoustic lev page and didnt find a place to enter this comment/reason 4 change....
Then the youtube link did actually play the right vid... but i lacked a proper desc.... so i entered a brief detail, thanks for reading!
!!!may jesus reserve a extra hot place in hell for them internet vandals/people of high places abusing their pwr!!! 66.66.127.44 17:49, 15 April 2007 (UTC)
[edit] The article is wrong
Sorry. But acoustic levitation is not limited to levitation in fluids. Furthermore, there more than one possible principle behind acoustic levitation (apart from the mentioned non-linear effects, the Bernoulli effect works nicely, too). I'll attempt to claw together some reference about what I know. In the mean while, stay tuned ;-) --80.134.6.161 08:24, 24 July 2007 (UTC)
[edit] Umm...
I'm pretty sure you're wrong there. With a basic understanding of physics, I can safely say this wouldn't work outside of a fluid. To cite wikipedia's own entry on fluids:
"A fluid is defined as a substance that continually deforms (flows) under an applied shear stress regardless of the magnitude of the applied stress. It is a subset of the phases of matter and includes liquids, gases, plasmas and, to some extent, plastic solids."
It seems to me that without a fluid, you actually have no medium in which this could ever work.
[edit] Umm...agreed
Acoustic levitation in a vacuum - not, since no acoustic waves in a vacuum. Levitation "in" solid, no sense. Ergo, acoustic levitation exists only in fluids.
Levitation by the Bernoulli principle, fine, but that is not acoustic levitation. Bernoulli's theory is in hydrodynamics, does not involve compressibility which is at the very heart of acoustics.
Coming to this article cold, IMO it's good and interesting, the only weaknesses I see are that the internal references don't work for me, nor the second external reference. The first external reference is fringe science, (but) well composed.
Adrian Pollock (talk) 22:29, 29 December 2007 (UTC)
