The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 03, 2021
Filed:
Dec. 02, 2016
Université DE Franche-comté, Besançon, FR;
Centre National DE LA Recherche Scientifique, Paris, FR;
Abdelkrim Khelif, École Valentin, FR;
Mahmoud Addouche, Besançon, FR;
Aliyasin El Ayouch, Besançon, FR;
UNIVERSITÉ DE FRANCHE-COMTÉ, Besançon, FR;
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris, FR;
Abstract
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 Eαlog (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.