On the potential of meta-poro-elastic systems with mass inclusions to achieve broadband near-perfect absorption coefficient - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2020

On the potential of meta-poro-elastic systems with mass inclusions to achieve broadband near-perfect absorption coefficient

S Ahsani
  • Fonction : Auteur
R F Boukadia
  • Fonction : Auteur
T G Zieliński
  • Fonction : Auteur
Ł Jankowski
  • Fonction : Auteur
C Claeys
  • Fonction : Auteur
W Desmet
  • Fonction : Auteur
E Deckers
  • Fonction : Auteur

Résumé

This paper discusses the potential of meta-poro-elastic systems with small mass inclusions to create broadband sound absorption performance under the quarter-wavelength limit. A first feasibility study is done to evaluate whether embedding small mass inclusions in specific types of foam can lead to near-perfect absorption at tuned frequencies. This paper includes an optimization routine to find the material properties that maximize the losses due to the mass inclusion such that a near-perfect/perfect absorption coefficient can be achieved at specified frequencies. The near-perfect absorption is due to the mass-spring effect, which leads to an increase in the viscous loss. Therefore, it is efficient in the viscous regime. The well-known critical frequency, which depends on the porosity and flow resistivity of the material, is commonly used as a criteria to distinguish the viscous regime from the inertial regime. However, for the types of foam of interest to this work, the value of critical frequency is below the mass-spring resonance frequency. Hence, the inverse quality factor is used to provides a more accurate estimation on the frequency at which the transition from the viscous regime to the inertial regime.
Fichier principal
Vignette du fichier
ISMA2020_Ahsani.pdf (553.9 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03160068 , version 1 (04-03-2021)

Identifiants

  • HAL Id : hal-03160068 , version 1

Citer

S Ahsani, R F Boukadia, C Droz, T G Zieliński, Ł Jankowski, et al.. On the potential of meta-poro-elastic systems with mass inclusions to achieve broadband near-perfect absorption coefficient. International Conference on Noise and Vibration Engineering, Sep 2020, Leuven, Belgium. ⟨hal-03160068⟩
36 Consultations
42 Téléchargements

Partager

Gmail Mastodon Facebook X LinkedIn More