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We introduced in [arXiv:1106.3204] a method to locate discontinuities of awave speed in dimension two from acoustic boundary measuments modelled by thehyperbolic Neumann-to-Dirichlet operator. Here we extend the method for soundhard obstacles in arbitrary dimension. We present numerical experiments withsimulated noisy data suggesting that the method is robust against measurementnoise.

Solving an inverse obstacle problem for the wave equation by using the boundary control method