Design and optimization of sound diffusers using RBF-based shapes and genetic algorithms

• Autores: Ricardo Patraquim, Luís Godinho, Paulo Amado-Mendes, Javier Redondo Pastor
• Localización: Tecniacústica 2017: 48º Congreso Español de Acústica ; Encuentro Ibérico de Acústica ; European Symposium on Underwater Acoustics Applications ; European Symposium on Sustainable Building Acoustics : A Coruña 3-6 Octubre 2017 / coord. por Antonio Calvo Manzano, Antonio Pérez López, 2017, ISBN 978-84-87985-29-4, págs. 908-917
• Idioma: inglés
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• Resumen

  • The optimization of diffusers’ design has been a topic of intense research in the last years. In this paper, the authors propose an alternative technique to define new shapes of sound diffusion configurations, based on the use of radial basis functions (RBF). In addition, to allow the definition of optimal surface shapes for a given frequency band, a genetic algorithm is used.

    The diffusion coefficient is computed within the optimization procedure using the Kirchoff integral equation and the Boundary Element Method (BEM). A set of results is presented and discussed, namely the influence of the geometric constraints imposed due to the future production of panel samples.