Experimental validation of deep-subwavelength by diffusion by acoustic metadiffusers

Journal article

Dance, S., Ballestero, E., Aygun, H., Jimenez, N., Groby, J-P. and Romero-Garcia, V. (2019). Experimental validation of deep-subwavelength by diffusion by acoustic metadiffusers. Applied Physics Letters. 115 (8). https://doi.org/10.1063/1.5114877
AuthorsDance, S., Ballestero, E., Aygun, H., Jimenez, N., Groby, J-P. and Romero-Garcia, V.
Abstract

An acoustic metadiffuser is a subwavelength locally resonant surface relying on slow sound propagation. Its design consists of rigidly backed slotted panels, with each slit being loaded by an array of Helmholtz resonators (HRs). Due to the slow sound properties, the effective
thickness of the panel can therefore be dramatically reduced when compared to traditional diffusers made of quarter-wavelength resonators. The aim of this work is to experimentally validate the concept of metadiffusers from the scattering measurements of a specific
metadiffuser design, i.e., a Quadratic Residue Metadiffuser (QRM). The experimental results reported herein are in a close agreement with analytical and numerical predictions, therefore showing the potential of metadiffusers for controlling sound diffusion at very low
frequencies.

Year2019
JournalApplied Physics Letters
Journal citation115 (8)
PublisherAIP
ISSN0003-6951
Digital Object Identifier (DOI)https://doi.org/10.1063/1.5114877
Publication dates
Print21 Aug 2019
Online20 Aug 2019
Publication process dates
Accepted06 Aug 2019
Deposited05 Sep 2019
Accepted author manuscript
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Open
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