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Asymmetric Acoustic Propagation of Wave Packets Via the Self-Demodulation Effect

Abstract : This Letter 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 106, 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.
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https://hal.archives-ouvertes.fr/hal-02177984
Contributeur : Thibaut Devaux <>
Soumis le : mardi 9 juillet 2019 - 14:42:47
Dernière modification le : vendredi 22 janvier 2021 - 11:58:00

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Thibaut Devaux, Vincent Tournat, Olivier Richoux, Vincent Pagneux. Asymmetric Acoustic Propagation of Wave Packets Via the Self-Demodulation Effect. Physical Review Letters, American Physical Society, 2015, 115 (23), ⟨10.1103/PhysRevLett.115.234301⟩. ⟨hal-02177984⟩

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