Acoustic behaviour of 3D periodic structures composed by perforated resonators

• Autores: Paulo Amado-Mendes, Luís Godinho, Adriana Baio Dias, Jesús Carbajo San Martín, Jaime Ramis Soriano
• 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. 1015-1022
• Idioma: inglés
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• Resumen

  • The periodic arrangement of acoustic scatterers is known to exhibit peculiar attenuation effects in ranges of forbidden frequencies. On the other hand, the presence of perforated surfaces, eventually complemented by acoustic absorbent materials, has been extensively studied to reduce acoustic reflections by plane surfaces. In the present work, the implementation of an efficient Boundary Element model (BEM) is adopted to numerically reproduce the acoustic behaviour of combined acoustic structures, composed by perforated resonators periodically arranged in space.

    Different numerical examples will be presented in this work enabling the analysis of the acoustic behaviour of different arrangements and compositions of such absorbent and sound insulation structured materials.