Numerical Study of Symmetric Hexagonal Acoustic Metasurface for Sound Transmission Loss under Normal Incidence
54º Congreso Español de Acústica — Tecniacústica 2023
Abstract
The interest in sound wave propagation on subwavelength regimes is a widely researched field. In this context, acoustic metamaterials have arisen as a potential source of new technologies for the development of lightweight acoustical devices in subwavelength dimensions. Previously research has evidenced the capacity of symmetric acoustic systems to achieve impressive acoustical behaviours, as an example, perfect sound absorption in wide broadband, enabled by the critical coupling of resonators with distinct resonances in symmetric axially located system. This work, analyses the sound transmission loss in these system types, through a finite element model. The objective of this research is to understand the applicability of these devices in the development of compact attenuators with potential application in different contexts of engineering, especially on ventilated systems in buildings.