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Article: Sound absorption of acoustic resonators with oblique perforations

TitleSound absorption of acoustic resonators with oblique perforations
Authors
Issue Date2020
Citation
Applied Physics Letters, 2020, v. 116, n. 5, article no. 054101 How to Cite?
AbstractLow-frequency airborne noise reduction is an issue of major concern in most practical cases due to the limiting space constraints. The applicability of acoustic resonators that not only work in this frequency range but can also be tuned is of great interest in many noise control applications such as muffler devices, noise barriers, or building isolation walls. This Letter studies the acoustic behavior of perforated panel absorbers with oblique perforations. Unlike more complex devices, the proposed absorber uses a simple concept that relies on the increase in the effective length of the panel by using perforations aligned obliquely with respect to the panel surface. In doing so, a shift of the resonance frequency toward low frequencies along with an increase in the sound absorption can be achieved provided that the geometrical characteristics of the absorber are properly chosen. A simple predictive model that relies on the fluid-equivalent theory was developed to investigate the acoustic properties of these absorbers, measurements in an impedance tube over additive manufactured samples serving to confirm the previous assertions. Preliminary results show the potential of these absorbers and encourage their further development for practical purposes.
Persistent Identifierhttp://hdl.handle.net/10722/318813
ISSN
2023 Impact Factor: 3.5
2023 SCImago Journal Rankings: 0.976
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorCarbajo, J.-
dc.contributor.authorGhaffari Mosanenzadeh, S.-
dc.contributor.authorKim, S.-
dc.contributor.authorFang, N. X.-
dc.date.accessioned2022-10-11T12:24:37Z-
dc.date.available2022-10-11T12:24:37Z-
dc.date.issued2020-
dc.identifier.citationApplied Physics Letters, 2020, v. 116, n. 5, article no. 054101-
dc.identifier.issn0003-6951-
dc.identifier.urihttp://hdl.handle.net/10722/318813-
dc.description.abstractLow-frequency airborne noise reduction is an issue of major concern in most practical cases due to the limiting space constraints. The applicability of acoustic resonators that not only work in this frequency range but can also be tuned is of great interest in many noise control applications such as muffler devices, noise barriers, or building isolation walls. This Letter studies the acoustic behavior of perforated panel absorbers with oblique perforations. Unlike more complex devices, the proposed absorber uses a simple concept that relies on the increase in the effective length of the panel by using perforations aligned obliquely with respect to the panel surface. In doing so, a shift of the resonance frequency toward low frequencies along with an increase in the sound absorption can be achieved provided that the geometrical characteristics of the absorber are properly chosen. A simple predictive model that relies on the fluid-equivalent theory was developed to investigate the acoustic properties of these absorbers, measurements in an impedance tube over additive manufactured samples serving to confirm the previous assertions. Preliminary results show the potential of these absorbers and encourage their further development for practical purposes.-
dc.languageeng-
dc.relation.ispartofApplied Physics Letters-
dc.titleSound absorption of acoustic resonators with oblique perforations-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1063/1.5132886-
dc.identifier.scopuseid_2-s2.0-85078999781-
dc.identifier.volume116-
dc.identifier.issue5-
dc.identifier.spagearticle no. 054101-
dc.identifier.epagearticle no. 054101-
dc.identifier.isiWOS:000513133500027-

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