Le Sat, 4 Jan 2014 20:19:27 +0000, Fons Adriaensen <[email protected]> a écrit :
> On Sat, Jan 04, 2014 at 06:16:31PM +0100, Dominique Michel wrote: > > > According to that presentation > > http://www.dalembert.upmc.fr/Oleron2010/docs/Presentations/Oleron-Barriere.pdf > > 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. > > Interesting, thanks for the pointer. And it closes the circle... > > The first slide is a quote from one of Beyer's papers: > > "It might be said that radiation pressure is a phenomenon that the > observer thinks he understands — for short intervals, and only > every now and then” > > I remember reading the paper that comes from a very long time ago, > and that was what inspired my remark about radiation pressure being > one of the more elusive topics in acoustics ! And classical physics is even worst. In Einstein formula e=mc^2, the only term for which we have a definition is c... For e, it is no definition, only equations which are not definitions, and this is the same issue with m=e/c^2, which is maybe the less obvious equation of all equations. Ciao, Dominique > > Ciao, > _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/listinfo/linux-audio-dev
