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Rainbow-trapping absorbers: Broadband, perfect and asymmetric sound absorption by subwavelength panels for transmission problems

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Rainbow-trapping absorbers: Broadband, perfect and asymmetric sound absorption by subwavelength panels for transmission problems

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dc.contributor.author Jimenez, Noe es_ES
dc.contributor.author Romero García, Vicente es_ES
dc.contributor.author Pagneux, Vincent es_ES
dc.contributor.author Groby, J.P. es_ES
dc.date.accessioned 2018-05-21T04:22:35Z
dc.date.available 2018-05-21T04:22:35Z
dc.date.issued 2017 es_ES
dc.identifier.issn 2045-2322 es_ES
dc.identifier.uri http://hdl.handle.net/10251/102312
dc.description.abstract [EN] Perfect, broadband and asymmetric sound absorption is theoretically, numerically and experimentally reported by using subwavelength thickness panels in a transmission problem. The panels are composed of a periodic array of varying crosssection waveguides, each of them being loaded by Helmholtz resonators (HRs) with graded dimensions. The low cut-off frequency of the absorption band is fixed by the resonance frequency of the deepest HR, that reduces drastically the transmission. The preceding HR is designed with a slightly higher resonance frequency with a geometry that allows the impedance matching to the surrounding medium. Therefore, reflection vanishes and the structure is critically coupled. This results in perfect sound absorption at a single frequency. We report perfect absorption at 300¿Hz for a structure whose thickness is 40 times smaller than the wavelength. Moreover, this process is repeated by adding HRs to the waveguide, each of them with a higher resonance frequency than the preceding one. Using this frequency cascade effect, we report quasi-perfect sound absorption over almost two frequency octaves ranging from 300 to 1000¿Hz for a panel composed of 9 resonators with a total thickness of 11¿cm, i.e., 10 times smaller than the wavelength at 300¿Hz. es_ES
dc.description.sponsorship The authors acknowledge fnancial support from the Metaudible Project No. ANR-13-BS09-0003, cofunded by ANR and FRAE.
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 Acoustics es_ES
dc.subject Metamaterials es_ES
dc.subject.classification FISICA APLICADA es_ES
dc.title Rainbow-trapping absorbers: Broadband, perfect and asymmetric sound absorption by subwavelength panels for transmission problems es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1038/s41598-017-13706-4 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. Departamento de Física Aplicada - Departament de Física Aplicada es_ES
dc.description.bibliographicCitation Jimenez, N.; Romero García, V.; Pagneux, V.; Groby, J. (2017). Rainbow-trapping absorbers: Broadband, perfect and asymmetric sound absorption by subwavelength panels for transmission problems. Scientific Reports. 7(1). doi:10.1038/s41598-017-13706-4 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1038/s41598-017-13706-4 es_ES
dc.description.upvformatpinicio 13595 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 7 es_ES
dc.description.issue 1 es_ES
dc.identifier.pmid 29051627
dc.identifier.pmcid PMC5648927
dc.relation.pasarela S\344704 es_ES
dc.contributor.funder Agence Nationale de la Recherche, Francia es_ES
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