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J Acoust Soc Am. 2016 Jun;139(6):3373. doi: 10.1121/1.4949542.

A nonlinear acoustic metamaterial: Realization of a backwards-traveling second-harmonic sound wave.

Author information

1
Key Laboratory of Modern Acoustics, Institute of Acoustics and School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China.

Abstract

An ordinary waveguide with periodic vibration plates and side holes can realize an acoustic metamaterial that simultaneously possesses a negative bulk modulus and a negative mass density. The study is further extended to a nonlinear case and it is predicted that a backwards-traveling second-harmonic sound wave can be obtained through the nonlinear propagation of a sound wave in such a metamaterial.

PMID:
27369164
DOI:
10.1121/1.4949542

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