Broadband nonreciprocal acoustic propagation using programmable boundary conditions : from analytical modelling to experimental implementation

Sami Karkar (1) , Emanuele de Bono (1) , Manuel Collet (1) , Gaël Matten (2) , Morvan Ouisse (2) , Etienne Rivet (3)

1 LTDS - Laboratoire de Tribologie et Dynamique des Systèmes
2 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)
3 EPFL - Ecole Polytechnique Fédérale de Lausanne

We theoretically, numerically and experimentally demonstrate the acoustic isolator effect in a one-dimensional waveguide with direction-dependent controlled boundary conditions. A theoretical model is used to explain the principle of nonreciprocal propagation in boundary-controlled waveguides. Numerical simulations are preformed on a reduced model to show the nonreciprocity as well as the passivity of the system through the computation of the scattering matrix and the power delivered by the system. Finally, an experimental implementation validates the potential of programmable boundary conditions for non-reciprocal propagation.

Domaines: Mécanique [physics]

Sami Karkar, Emanuele de Bono, Manuel Collet, Gaël Matten, Morvan Ouisse, et al.. Broadband nonreciprocal acoustic propagation using programmable boundary conditions : from analytical modelling to experimental implementation. Physical Review Applied, 2019, 12 (5), pp.054033 (10). ⟨10.1103/PhysRevApplied.12.054033⟩. ⟨hal-02377055⟩