Title: Sound absorption properties of a low-density perforated date palm fibres panel

Authors: A.K. Elwaleed; N. Nikabdullah; M.J.M. Nor; M.F.M. Tahir; R. Zulkifli

Addresses: Department of Mechanical Engineering, Jubail University College, P.O. Box 10074, Jubail Industrial City 31961, Kingdom of Saudi Arabia and Institute of Space Science, UKM, Malaysia ' Institute of Space Science, UKM, Malaysia ' Department of Mechanical and Materials Engineering, UKM, Malaysia ' Department of Mechanical and Materials Engineering, UKM, Malaysia ' Department of Mechanical and Materials Engineering, UKM, Malaysia

Abstract: Sound absorption properties of a natural waste of a low density date palm fibre perforated panel have been presented. The measurements were carried out for a single layer sample using an impedance tube. A simulation was performed using Delany and Bazley model for the sound absorption coefficient for the single layer date palm fibre. The experiment was conducted for the panel with and without perforated plate facing. Three air gap thicknesses were used between the date palm fibre sample and the rigid backing of the impedance tube to study the effect of the air gap on the sound absorption. The results showed an improvement on the sound absorption coefficient at higher and lower frequency ranges when facing the panel with perforated plate. Further studies could be conducted to check the effect of different densities and perforations on the sound absorption of the date palm fibres.

Keywords: impedance tube; perforated panels; air gap thickness; natural fibres; sound absorption coefficient; date palm fibres; natural waste; simulation.

DOI: 10.1504/IJCAT.2015.073586

International Journal of Computer Applications in Technology, 2015 Vol.52 No.4, pp.213 - 219

Available online: 13 Dec 2015 *

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