Abstract
Sound diffusers are structured surfaces designed to control the scattering of acoustic waves, mainly used in room acoustics to improve sound quality. However, as they are mainly based on quarter-wavelength resonators, phase-grating diffusers result in heavy and thick structures. We present a novel approach to design deep-subwavelength sound diffusers based on subwavelength resonating units, i.e., metamaterials. The proposed ''metadiffusers'' show broadband diffusion ranging from 250 to 2 kHz using panels of 3 cm, 20 times thinner than traditional designs. In addition, their performance can be tailored to classical quadratic residue, primitive root and ternary sequence designs.
BibTeX citation
@inproceedings{JimenezDENORMS2020,
author = {Noé Jiménez},
booktitle = {8th DENORMS CA15125 Workshop, Action Final event. Coimbra, Portugal. 21th February},
editor = {Book of abstracts},
month = {2},
organization = {CNRS, Universidade de Coimbra},
pages = {1},
publisher = {COST Action Denorms},
series = {Invited},
title = {How to design thin sound diffusers for room acoustics based on metasurfaces-metadiffusers},
url = {https://denorms.eu/2019/05/03/workshop-8/},
year = {2020}
}