dc.contributor.author | Bennett, Gareth | |
dc.date.accessioned | 2024-01-08T09:40:48Z | |
dc.date.available | 2024-01-08T09:40:48Z | |
dc.date.issued | 2024 | |
dc.date.submitted | 2024 | en |
dc.identifier.citation | Wang, Jiayu, Bennett, Gareth J., Ultra-broadband sound absorption in a compact multi-chamber micro-perforated panel absorber with varying depths, AIP Advances, 14, 1, 2024 | en |
dc.identifier.issn | 2158-3226 | |
dc.identifier.other | Y | |
dc.description | PUBLISHED | en |
dc.description.abstract | This study presents an enhanced multi-chamber micro-perforated panel absorber (MC-MPPA) with varying sub-chamber depths, offering ultra-broadband low-frequency sound absorption. Traditional micro-perforated panel absorbers are constrained by a limited bandwidth, necessitating impossibly small perforations for optimal low-frequency absorption. Our innovative design addresses these constraints with a lightweight, compact panel structure that uses varied chamber depths and unique porosities. Using the two-point impedance method from graph theory, an MC-MPPA was modeled and optimized. Notably, our MC-MPPA test pieces achieved impressive sound absorption coefficients experimentally of over 0.8 in the whole frequency ranges of [397–1000] and [698–1895] Hz. The absorber’s thickness is a mere 47 mm, equivalent to 1/18.2 and 1/10.5 of the sound wavelength at the minimum operational frequency, respectively. Theoretically, with a maximum sub-chamber depth of just 20 mm, average absorption coefficient values of 0.6780 and 0.6483 were observed in [200–3000] and [200–4000] Hz ranges, respectively. Our optimization algorithm permits the definition of practical geometric parameters, promising substantial industrial benefits. The results have been validated theoretically, numerically, and experimentally. | en |
dc.language.iso | en | en |
dc.relation.ispartofseries | AIP Advances; | |
dc.relation.ispartofseries | 14; | |
dc.relation.ispartofseries | 1; | |
dc.rights | Y | en |
dc.subject | Porous media | en |
dc.subject | 3D printing | en |
dc.subject | Metamaterials | en |
dc.subject | Analog circuits | en |
dc.subject | Acoustic phenomena | en |
dc.subject | Acoustical properties | en |
dc.subject | Sound absorbers | en |
dc.title | Ultra-broadband sound absorption in a compact multi-chamber micro-perforated panel absorber with varying depths | en |
dc.type | Journal Article | en |
dc.type.supercollection | scholarly_publications | en |
dc.type.supercollection | refereed_publications | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/bennettg | |
dc.identifier.rssinternalid | 261153 | |
dc.identifier.doi | 10.1063/5.0187328 | |
dc.rights.ecaccessrights | openAccess | |
dc.identifier.orcid_id | 0000-0002-1621-7533 | |
dc.identifier.uri | http://hdl.handle.net/2262/104341 | |