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3 results match your criteria: "Laboratoire d'Acoustique de l'Université du Maine - CNRS UMR 6613[Affiliation]"
Phys Rev E
August 2017
Department of Physics, National and Kapodistrian University of Athens, Panepistimiopolis, Zografos, Athens 15784, Greece.
We study analytically and numerically envelope solitons (bright and gap solitons) in a one-dimensional, nonlinear acoustic metamaterial, composed of an air-filled waveguide periodically loaded by clamped elastic plates. Based on the transmission line approach, we derive a nonlinear dynamical lattice model which, in the continuum approximation, leads to a nonlinear, dispersive, and dissipative wave equation. Applying the multiple scales perturbation method, we derive an effective lossy nonlinear Schrödinger equation and obtain analytical expressions for bright and gap solitons.
View Article and Find Full Text PDFSci Rep
July 2017
Laboratoire d'Acoustique de l'Université du Maine - CNRS UMR 6613, Le Mans, 72000, France.
We present deep-subwavelength diffusing surfaces based on acoustic metamaterials, namely metadiffusers. These sound diffusers are rigidly backed slotted panels, with each slit being loaded by an array of Helmholtz resonators. Strong dispersion is produced in the slits and slow sound conditions are induced.
View Article and Find Full Text PDFJ Acoust Soc Am
June 2001
Laboratoire d'Acoustique de l'Université du Maine-CNRS UMR 6613, Le Mans, France.
This article presents an approximate solution for weak nonlinear standing waves in the interior of an exponential acoustic horn. An analytical approach is chosen assuming one-dimensional plane-wave propagation in a lossless fluid within an exponential horn. The model developed for the propagation of finite-amplitude waves includes linear reflections at the throat and at the mouth of the horn, and neglects boundary layer effects.
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