How important is the shape of the closed box?

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Eldam

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Joined 2012
I assume such very light mechanical tossing like a balloon would just move the modes in a random way (I'm not sure how it can change the internal volume with long waves bass frequencies)! Or indeed doesn't work at all ! :whacko:

Bah it's physic, fluid mechanic and math : too much complicate for me ...
 

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