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Asymmetric acoustic propagation of wave packets via the self-demodulation effect

This article presents the experimental characterization of nonreciprocal elastic wave transmission in a single-mode elastic waveguide. This asymmetric system is obtained by coupling a selection layer with a conversion layer: the selection component is provided by a phononic crystal, while the conversion is achieved by a nonlinear self-demodulation effect in a 3D unconsolidated granular medium. A quantitative experimental study of this acoustic rectifier indicates a high rectifying ratio, up to $10^6$, with wide band (10 kHz) and an audible effect. Moreover, this system allows for wave-packet rectification and extends the future applications of asymmetric systems.

preprint2015arXivOpen access
Thibaut DevauxVincent TournatOlivier RichouxVincent Pagneux
physics.class-ph
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Open access4 authors1 topic
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Thibaut DevauxVincent TournatOlivier RichouxVincent Pagneux

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