WAVE PHYSICS

An acoustic black hole

An elegant experiment showing that acoustic waves are amplified after scattering by a rotating body demonstrates an effect predicted in 1971 by Yakov Zel’dovich. This result has implications for the understanding of scattering from black holes.

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Fig. 1: A simple setup to measure Zel’dovich amplification.

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Correspondence to Bruce W. Drinkwater.

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Drinkwater, B.W. An acoustic black hole. Nat. Phys. (2020). https://doi.org/10.1038/s41567-020-0954-1

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