Modelling and optimisation of sound absorption in replicated microcellular metals

Otaru, A.J. and Morvan, H.P. and Kennedy, A.R. (2018) Modelling and optimisation of sound absorption in replicated microcellular metals. Scripta Materialia, 150. pp. 152-155. ISSN 1359-6462

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Abstract

Wilson's poroacoustic model has been shown to be an accurate predictor of sound absorption in porous metals with bottleneck type structures. When used to optimise pore structures, using porosity and permeability as variables, the most broadband absorption is predicted for the highest porosity achievable (approximately 70%) and for a permeability of the order 10−10 m2. Although performance close to that for glass wool is not possible, with these porosities, specific strength and stiffness exceeding those for many polymers are obtained, making these materials viable for load bearing components with credible soundproofing.

Item Type:
Journal Article
Journal or Publication Title:
Scripta Materialia
Additional Information:
This is the author’s version of a work that was accepted for publication in Scripta Materialia. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Scripta Materialia, 150, 2018 DOI: 10.1016/j.scriptamat.2018.03.022
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3104
Subjects:
ID Code:
124166
Deposited By:
Deposited On:
22 Mar 2018 09:14
Refereed?:
Yes
Published?:
Published
Last Modified:
26 Nov 2020 05:29