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Metadiffusers: Deep-subwavelength sound diffusers

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Metadiffusers: Deep-subwavelength sound diffusers

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dc.contributor.author Jimenez, Noe es_ES
dc.contributor.author Cox, Trevor J. es_ES
dc.contributor.author Romero García, Vicente es_ES
dc.contributor.author Groby, J.P. es_ES
dc.date.accessioned 2020-07-30T03:34:49Z
dc.date.available 2020-07-30T03:34:49Z
dc.date.issued 2017-07-14 es_ES
dc.identifier.issn 2045-2322 es_ES
dc.identifier.uri http://hdl.handle.net/10251/148883
dc.description.abstract [EN] We present deep-subwavelength diffusing surfaces based on acoustic metamaterials, namely metadiffusers. These sound diffusers are rigidly backed slotted panels, with each slit being loaded by an array of Helmholtz resonators. Strong dispersion is produced in the slits and slow sound conditions are induced. Thus, the effective thickness of the panel is lengthened introducing its quarter wavelength resonance in the deep-subwavelength regime. By tuning the geometry of the metamaterial, the reflection coefficient of the panel can be tailored to obtain either a custom reflection phase, moderate or even perfect absorption. Using these concepts, we present ultra-thin diffusers where the geometry of the metadiffuser has been tuned to obtain surfaces with spatially dependent reflection coefficients having uniform magnitude Fourier transforms. Various designs are presented where, quadratic residue, primitive root and ternary sequence diffusers are mimicked by metadiffusers whose thickness are 1/46 to 1/20 times the design wavelength, i.e., between about a twentieth and a tenth of the thickness of traditional designs. Finally, a broadband metadiffuser panel of 3 cm thick was designed using optimization methods for frequencies ranging from 250 Hz to 2 kHz. es_ES
dc.description.sponsorship This article is based upon work from COST Action DENORMS - CA15125, supported by COST (European Cooperation in Science and Technology). The authors acknowledge financial support from the Metaudible Project No. ANR-13-BS09-0003, cofunded by ANR and FRAE. es_ES
dc.language Inglés es_ES
dc.publisher Nature Publishing Group es_ES
dc.relation.ispartof Scientific Reports es_ES
dc.rights Reconocimiento (by) es_ES
dc.subject Specular reflection es_ES
dc.subject Sonic crystals es_ES
dc.subject Phase gratings es_ES
dc.subject Absorption es_ES
dc.subject Resonators es_ES
dc.subject Propagation es_ES
dc.subject Inclusions es_ES
dc.subject Scattering es_ES
dc.subject Perfect es_ES
dc.subject.classification FISICA APLICADA es_ES
dc.title Metadiffusers: Deep-subwavelength sound diffusers es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1038/s41598-017-05710-5 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/COST//CA15125/EU/Designs for Noise Reducing Materials and Structures (DENORMS)/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/ANR//ANR-13-BS09-0003/FR/Design of metamaterials for the absorption of audible sound/Metaudible/ es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto Universitario de Matemática Pura y Aplicada - Institut Universitari de Matemàtica Pura i Aplicada es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular es_ES
dc.description.bibliographicCitation Jimenez, N.; Cox, TJ.; Romero García, V.; Groby, J. (2017). Metadiffusers: Deep-subwavelength sound diffusers. Scientific Reports. 7:1-12. https://doi.org/10.1038/s41598-017-05710-5 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1038/s41598-017-05710-5 es_ES
dc.description.upvformatpinicio 1 es_ES
dc.description.upvformatpfin 12 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 7 es_ES
dc.identifier.pmid 28710374 es_ES
dc.identifier.pmcid PMC5511165 es_ES
dc.relation.pasarela S\343316 es_ES
dc.contributor.funder Agence Nationale de la Recherche, Francia es_ES
dc.contributor.funder European Cooperation in Science and Technology es_ES
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