On The Modelling Of Cavities At Low Frequencies With The BEM

Peter Møller Juhl, Vicente Cutanda Henriquez, Salvador Barrera Figueroa

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Abstract

Many transducers (e.g. microphones) consist of a moving part facing the exterior on one side and facing a closed cavity on the other. In order to obtain and solve a model of such transducers, a fully coupled model can be used and the performance of this model will rely of the performance of the sub-models being coupled. Previous work has revealed that the performance of an interior lossless BEM formulation concerning a cavity with rigid walls can pose a limit on the accuracy of a fully coupled model of the transducer – in particular when including viscous and thermal losses in the cavity. This paper investigates the accuracy of a lossless acoustic BEM formulation for cavities with rigid walls at low frequencies and addresses possible solutions for restoring accuracy.
Original languageEnglish
Title of host publicationProceedings of internoise 2019
PublisherInternational Institute of Noise Control Engineering
Publication date2019
Pages2217-2226
Article number2070
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 Acoustics
  • Low Frequencies
  • Accuracy

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