Enhanced resonance of sparse arrays of Helmholtz resonators—Application to perfect absorption - ENSTA Paris - École nationale supérieure de techniques avancées Paris Accéder directement au contenu
Article Dans Une Revue Journal of the Acoustical Society of America Année : 2019

Enhanced resonance of sparse arrays of Helmholtz resonators—Application to perfect absorption

Résumé

We inspect the influence of the spacing on the resonance of a periodic arrangement of Helmholtz resonators. An effective problem is used which captures accurately the properties of the resonant array within a large range of frequency, and whose simplified version leaves us with an impedance condition. It is shown that the strength of the resonance is enhanced when the array becomes sparser. This degree of freedom on the radiative damping is of particular interest since it does not affect the resonance frequency nor the damping due to losses within each resonator; besides, it does not affect the total thickness of the array. We show that it can be used for the design of a perfect absorbing walls.
Fichier principal
Vignette du fichier
draft_Helmholtz_der.pdf (2.17 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02381074 , version 1 (26-11-2019)

Identifiants

Citer

Agnès Maurel, Jean-François Mercier, Trung Kien Pham, J.-J Marigo, Abdelwaheb Ourir. Enhanced resonance of sparse arrays of Helmholtz resonators—Application to perfect absorption. Journal of the Acoustical Society of America, 2019, 145 (4), pp.2552-2560. ⟨10.1121/1.5098948⟩. ⟨hal-02381074⟩
252 Consultations
494 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More