Centre National De La Recherche Scientifique

Université De Franche Comte

Centre National De La Recherche Scientifique-cnrs

Abdelkrim Khelif

Vincent Laude

Abdelkrim Choujaa

Mahmoud Addouche

Aliyasin El Ayouch

Some embodiments are directed to an elementary acoustic metamaterial cell, including a body made of solid material and at least one resonator defining a groove of width l and depth p, the groove being open on the surface of the body, wherein the depth p is set by a resonant frequency (f) of the cell according to a relationship x, c being the speed of sound in air and the width l is set by an energy density confined in the cell according to a logarithmic relationship E&#x3b1;log (l) determined experimentally, the groove having an acoustic absorption controlled by a ratio between the depth p and the width l of the groove. Some embodiments are also directed to an acoustic screen including such an elementary cell.

Absorbent acoustic metamaterial

An acoustic wave device comprising a piezoelectric layer on an omnidirectional acoustic mirror and excitation and/or reception means on a surface of said piezoelectric layer, capable of exciting waves in a band gap of the acoustic mirror.

High-frequency acoustic wave device

Growing community of inventors

Besancon, France

Abdelkrim Khelif