Eleftherios Christos Statharas et al 2019 Mater. Res. Express 6 086204
Abstract:
Sound absorption performance of porous poly(vinylidene fluoride) (PVDF) foams was investigated using a finite element model. Analyses with acoustic modelling and numerical simulation on a hollow PVDF cylinder showed the combination of piezoelectric and conductive effects substantially contributed to airborne sound absorption. The piezoelectric effect did not take any effect on the sound absorption when the piezoelectric cylinder was an ideal dielectric without any conductivity to dissipate the charges generated from the piezoelectric effect. The maximum noise mitigation effect occurred when the resistive and capacitive impedances match. The agreement between the simulation results and previous experimental observations indicated that the high performance airborne sound absorption in semi-conductive foams was achieved due to hybrid local piezoelectric effect for converting sound to electricity and appropriate internal conductive function to dissipate the electrical charges.
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Funding Info:
This project is partially supported by Singapore Maritime Institute under the Maritime Sustainability R&D Programme, Project ID: SMI-2015-MA-07 (IMRE/16-7P1125), and by the Singapore Ministry of National Development and National Research Foundation under L2NIC Award No. L2NICCFP1-2013-9 (IMRE/14-9P1112).
Description:
This is an author-created, un-copyedited version of an article accepted for publication/published
in Materials Research Express. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/2053-1591/ab1972