Reverse Doppler Effect of Sound

Details Reverse Doppler Effect of Sound Reverse Doppler Effect of Sound

2009-01-19

arxiv.org/abs/0901.2772v2

Phys. Rev. Lett. 104, 054301 (2010)

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

We report observation of reverse Doppler effect in a double negative acoustic metamaterial. The metamaterial exhibited negative phase velocity and positive group velocity. The dispersion relation is such that the wavelength corresponding to higher frequency is longer. We observed that the frequency was down-shifted for the approaching source, and up-shifted when the source receded.

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