concert in berlin

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On Sunday 20 September 2009 23:31:16 Tony Hardie-Bick wrote:
> Hmmm - always wondered - is it, in theory possible, to reconstruct a volume
> of sound simply by defining transmissions on its enclosing surface. So, now
> I have the answer :)
>
> I haven't... checked the maths, but, I understand this has already been
> done :)

Probably has something to do with Ostrogradsky's theorem 
(http://en.wikipedia.org/wiki/Divergence_theorem). As long as there is no 
sound source inside your enclosing surface, all you need to know is the flux 
through the surface (and probably also the air pressure inside).
Don't ask me why I remember that...