Acoustic behaviour of 3D periodic structures composed by perforated resonators
- Paulo Amado Mendes
- Luís Godinho
- Adriana Baio Dias
- Jesús Carbajo
- Jaime Ramis
- Antonio Calvo-Manzano (coord.)
- Antonio Pérez-López (coord.)
Publisher: Sociedad Española de Acústica
ISBN: 978-84-87985-29-4
Year of publication: 2017
Pages: 1015-1022
Congress: Congreso Español de Acústica ; Encuentro Ibérico de Acústica (48. 2017. A Coruña)
Type: Conference paper
Sustainable development goals
Abstract
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.