Ultrasonic insulation using a Helmholtz-like phononic crystal with a slight filling factor

A. El Madani, S. Bensallam, A. Elayouch, A. Khelif, Y. Achaoui, A. Bouaaddi, H. Jakjoud

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

Metamaterials are artificial materials designed to control and manipulate waves. They present the advantage to prohibit acoustic propagation in some frequency ranges called Band Gaps. In this paper, we present a series of Helmholtz-like resonators shaped for ultrasonic insulation purposes. This host plate is made of silicon in which the unit cell represents a phononic membrane formed by a sub-wavelength aperture and two Helmholtz resonators facing each other and immersed in water. The finite element simulations are performed between frequencies 1.7 MHz and 2.95 MHz. It is shown that such configuration exhibits a large band gap exceeding 1000 kHz and an attenuation up to -35 dB.

Original languageEnglish
Title of host publicationProceedings of the 4th International Conference on Smart City Applications, SCA 2019
PublisherAssociation for Computing Machinery
ISBN (Electronic)9781450362894
DOIs
Publication statusPublished - 2 Oct 2019
Externally publishedYes
Event4th International Conference on Smart City Applications, SCA 2019 - Casablanca, Morocco
Duration: 2 Oct 20194 Oct 2019

Publication series

NameACM International Conference Proceeding Series

Conference

Conference4th International Conference on Smart City Applications, SCA 2019
Country/TerritoryMorocco
CityCasablanca
Period2/10/194/10/19

Keywords

  • Acoustic Metamaterials
  • Helmholtz resonators
  • Phononic crystals
  • Sound comfort

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