[LAD] Audio Levitation

Patrick Shirkey pshirkey at boosthardware.com
Sat Jan 4 15:23:45 UTC 2014

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:


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

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