Computing the Sound of the Sea in a Seashell

09/07/2020

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by   Jonathan Ben-Artzi, et al.

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The question of whether there exists an approximation procedure to compute the resonances of any Helmholtz resonator, regardless of its particular shape, is addressed. A positive answer is given, and it is shown that all that one has to assume is that the resonator chamber is bounded and that its boundary is 𝒞^2. The proof is constructive, providing a universal algorithm which only needs to access the values of the characteristic function of the chamber at any requested point.