4 Jan
2014
4 Jan
'14
5:56 p.m.
Le Sat, 4 Jan 2014 13:39:05 +0000,
Fons Adriaensen <fons(a)linuxaudio.org> a écrit :
On Sat, Jan 04, 2014 at 09:24:54PM +1100, Patrick
Shirkey wrote:
According to that presentation
http://www.dalembert.upmc.fr/Oleron2010/docs/Presentations/Oleron-Barriere.…
it look like Langevin (which is the same than Rayleigh first formula
in 1902) apply well when we are long enough from the source, and when
we are in its vicinity, Rayleigh (1905) must be applied.
Dominique
Does cavitation have a role to play?
No idea. If it does that could be rather destructive on some
materials.
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).
Ciao,