Characterization of acoustic metasurface absorbers usingnumerical methods including viscous and thermal losses

Peter Risby Andersen, Vicente Cutanda Henriquez, Luis Godinho, Jean-Daniel Chazot, Jesús Carbajo San Martín

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Abstract

Acoustic meta-surfaces are periodic structures commonly realised using subwavelength sized resonators. One of their possible applications is in noise control where they can be applied to create very compact sound absorbers. Numerical modelling and characterization of meta-surfaces require the inclusion of acoustic viscous and thermal dissipation effects. Several variations of numerical methods are available that include such losses, each having different computational benefits and limitations. In this work, numerical methods that incorporate dissipation are applied to study the normal absorbing properties of several meta-surface designs. The results will be used to both benchmark the different numerical methods, but also to extract data for simplified fluid equivalent models that can be used as input for large-scale simulations including meta-surfaces.
Original languageEnglish
Title of host publicationProceedings of internoise 2019
Number of pages11
PublisherInternational Institute of Noise Control Engineering
Publication date2019
Article number1889
ISBN (Print)978-84-87985-31-7
Publication statusPublished - 2019
Event48th International Congress and Exhibition on Noise Control Engineering - Palacio Municipal de Congresos de Madrid, Madrid, Spain
Duration: 16 Jun 201919 Jun 2019
Conference number: 48
https://internoise2019.org/

Conference

Conference48th International Congress and Exhibition on Noise Control Engineering
Number48
LocationPalacio Municipal de Congresos de Madrid
CountrySpain
CityMadrid
Period16/06/201919/06/2019
Internet address

Keywords

  • Numerical methods
  • Viscothermal losses
  • Sound absorption
  • Meta-surfaces

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