On Sun, January 5, 2014 12:39 am, Fons Adriaensen wrote: > On Sat, Jan 04, 2014 at 09:24:54PM +1100, Patrick Shirkey wrote: > >> Does cavitation have a role to play? > > No idea. If it does that could be rather destructive on some > materials. >
This little guy seems to have mastered the art: http://www.youtube.com/watch?v=1jvcgz-BiHs I suppose it is possible that some materials could be quite energy efficient as they are destructed. I wonder if it is theoretically possible to harness this affect to generate energy from some exotic materials thereby using sound as a tool to generate energy which could be used to generate more sound thereby creating a pretty impressive feedback loop. > What is clear is that acoustic radiation pressure plays a role. > And that's a subject that has caused a lot of confusion and false > results throughout the history of acoustics as a science. Some big > names (including Rayleigh) have burnt their fingers on it, so it's > not and easy matter. To prime the confusion, there are at least > two formulations of acoustic radiation pressure: one from Rayleigh > (which depends on non-linearity) and one due to Langevin (which > does not depend on it). > Theoretically would an ambisonic levitation system be able to lift an object with large surface area, high rigidity and low mass? For example a carpet made from layered graphene? Would it require less energy than an equivalent magnetic levitation system? I wonder how much graphene is required to support an object with the mass of a human. -- Patrick Shirkey Boost Hardware Ltd _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/listinfo/linux-audio-dev
