The Effect of Compression Ratio on the Acoustical Absorption of Date Palm Fibers

  • Lamyaa Abd ALRahman Jawad, Zawawi Ibrahim

Abstract

In this paper, a theoretical study is presented to determine the effect of compression ratio on
the acoustic absorption of date palm fibers (DPF) mixed with latex. The study has employed
Johnson-Allard method to find the acoustic absorption coefficient (AAC) at different
compression ratios (1-1.6), as well as the influence of compression on several acoustic
parameters. Two different thicknesses, 30 and 50 mm, are selected with appropriate time periods
to test the effective parameters for a range of frequencies between 100-5000 Hz based on a
simulation prepared for that purpose. Results show that the increasing of compression ratio
increases AAC values, especially at high frequencies. Furthermore, the compression leads to
increase flow resistivity and tortuosity, while porosity, viscous length and thermal characteristic
length are decreased. Finally, the analytical for the effect of compression ratio shows that lowfrequency absorption as well as wide span absorption enhanced strongly by compressing the
material without any increase of extra layer

Published
2020-05-10
How to Cite
Lamyaa Abd ALRahman Jawad, Zawawi Ibrahim. (2020). The Effect of Compression Ratio on the Acoustical Absorption of Date Palm Fibers. International Journal of Advanced Science and Technology, 29(10s), 1332 - 1338. Retrieved from http://sersc.org/journals/index.php/IJAST/article/view/14632
Section
Articles