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Enhancement of low frequency sound absorption by placing thin plates on surface or between layers of porous materials
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0002-9632-8398
2019 (English)In: Journal of the Acoustical Society of America, ISSN 0001-4966, E-ISSN 1520-8524, Vol. 146, no 2, p. EL141-EL144Article in journal (Refereed) Published
Abstract [en]

Rigid thin plates can be used, either on the surface or between layers of materials, to improve the sound absorption properties of porous materials at low frequencies, especially for materials with low sound absorption. Measurement results obtained from a 100mm impedance tube, for different combinations of porous materials and thin plates, are supplied. Possible physical explanations are discussed. The size of the plate, together with the original properties of the porous material, determines the useful frequency region of the method. The technique of surface-placed thin plates can be directly applied to existing structures without making any changes of the original system, and the results are comparable to those with more complicated modifications.

Place, publisher, year, edition, pages
ACOUSTICAL SOC AMER AMER INST PHYSICS , 2019. Vol. 146, no 2, p. EL141-EL144
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-260193DOI: 10.1121/1.5121571ISI: 000483887400010PubMedID: 31472554Scopus ID: 2-s2.0-85070565374OAI: oai:DiVA.org:kth-260193DiVA, id: diva2:1355873
Note

QC 20190930

Available from: 2019-09-30 Created: 2019-09-30 Last updated: 2019-09-30Bibliographically approved

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Feng, Leping

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