Abnormal acoustic transmission in a waveguide with perforated screens

Lucas Chesnel, Sergei A. Nazarov

Research output: Contribution to journalArticlepeer-review

Abstract

We consider the propagation of the piston mode in an acoustic waveguide obstructed by two screens with small holes. In general, due to the features of the geometry, almost no energy of the incident wave is transmitted through the structure. The goal of this article is to show that by tuning carefully the distance between the two screens, which form a resonator, one can get almost complete transmission. We obtain an explicit criterion, not so obvious to intuit, for this phenomenon to happen. Numerical experiments illustrate the analysis.

Original languageEnglish
Pages (from-to)9-19
JournalComptes Rendus - Mecanique
Volume349
Issue number1
DOIs
StatePublished - 2021

Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials

Keywords

  • Abnormal transmission
  • Asymptotic analysis
  • Perforated screens
  • Resonator
  • Waveguides

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