Locally or Non-Locally Reacting Boundaries: Does it Make a Significant Acoustic Difference?

As an alternative for the common geometric room acoustical models, a wave theory-based model has been developed derived from the so-called WRW scheme, often used in seismic modelling [1, 2]. In this model, the wave properties of sound are appropriately taken into account. The proposed model is simil...

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Bibliographic Details
Published in:Building acoustics 2014-06, Vol.21 (2), p.117-124
Main Authors: Opdam, Rob, de Vries, Diemer, Vorländer, Michael
Format: Article
Language:English
Subjects:
Acoustics
Boundaries
Boundary element method
Computational fluid dynamics
Construction
Mathematical analysis
Modelling
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Summary:As an alternative for the common geometric room acoustical models, a wave theory-based model has been developed derived from the so-called WRW scheme, often used in seismic modelling [1, 2]. In this model, the wave properties of sound are appropriately taken into account. The proposed model is similar to the Boundary Element Method (BEM). Other than in BEM, in the WRW scheme non-locally reacting room boundaries can be included in the modelling process using only the fluid domain. The results of sound field modelling in rooms with locally as well as non-locally reacting boundaries are presented. The differences are analysed and their relevance is discussed.
ISSN:1351-010X
2059-8025
DOI:10.1260/1351-010X.21.2.117