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Article Dans Une Revue Applied Physics Letters Année : 2019

Experimental validation of deep-subwavelength diffusion by acoustic metadiffusers

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Résumé

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.
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Dates et versions

hal-02366275 , version 1 (15-11-2019)

Identifiants

Citer

Eric Ballestero, Noé Jiménez, J.-P. Groby, S. Dance, H. Aygun, et al.. Experimental validation of deep-subwavelength diffusion by acoustic metadiffusers. Applied Physics Letters, 2019, 115 (8), pp.081901. ⟨10.1063/1.5114877⟩. ⟨hal-02366275⟩
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