Asymmetric acoustic propagation of wave packets via the self-demodulation effect
Thibaut Devaux, Vincent Tournat, Olivier Richoux, Vincent Pagneux
TL;DR
This paper experimentally demonstrates a highly efficient, wide-band acoustic rectifier using a phononic crystal and nonlinear self-demodulation in granular media, enabling asymmetric wave packet transmission.
Contribution
It introduces a novel asymmetric acoustic system combining phononic crystals and nonlinear effects for wave rectification, with high rectification ratio and broad bandwidth.
Findings
Rectification ratio up to 10^6
Wide band operation of 10 kHz
Audible effect of wave-packet rectification
Abstract
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 , 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.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.