I have read somewhere something that sounds like that:
'Given the shape of a drum , thanks to well-known formulas, we can deduce all its vibration frequencies and so the sound that it is capable to produce'
My question is this:
since there are almost no regions of the plane for which we can solve explicitly the wave equation ( then I obtain an eigenvalue problem), is this assertion true or expressed correctly? Is this the meaning of this phrase?
Thanks a lot!!