Abstract
In this work, we show the possibilities of acoustic metamaterials for designing subwavelength structured materials for perfect sound absorption and diffusion. Based on the concepts of slow waves and critical coupling, we design resonant building blocks that can be assembled to create deep subwavelength acoustic treatments for sound absorption and diffusion with performances equivalent or superior to the usual acoustic treatments. Perfect absorption is addressed in both pure reflection and transmission, two problems of increasing complexity. Diffusers as well as perfect absorbers, both with subwavelength dimensions, are compared to traditional treatments, showing a new way of designing acoustic treatments with tunable properties.
BibTeX citation
@article{Romero2020AT,
author = {Vicent Romero-García and Vincent Pagneux and Jean-Philippe Groby and Noé Jiménez and Eric Ballestero},
doi = {https://www.bruit.fr/acoustique-techniques/nouveau-numero-d-acoustique-techniques-n-94},
issn = {N/D},
journal = {Acoustique et Techniques},
month = {12},
pages = {33-39},
title = {Metamateriaux pour l'acoustique audible : Absorption parfaite et diffusion sublongueur d'onde},
url = {https://www.bruit.fr/acoustique-techniques/nouveau-numero-d-acoustique-techniques-n-94},
volume = {94-95},
year = {2020}
}