Research Article Open Access

Experimental Study on Natural Fibers for Green Acoustic Absorption Materials

Lamyaa Abd ALRahman1, Raja Ishak Raja1 and Roslan Abdul Rahman1
  • 1 University Technology Malaysia, Malaysia
American Journal of Applied Sciences
Volume 10 No. 10, 2013, 1307-1314

DOI: https://doi.org/10.3844/ajassp.2013.1307.1314

Submitted On: 1 January 2013 Published On: 6 September 2013

How to Cite: ALRahman, L. A., Raja, R. I. & Rahman, R. A. (2013). Experimental Study on Natural Fibers for Green Acoustic Absorption Materials. American Journal of Applied Sciences, 10(10), 1307-1314. https://doi.org/10.3844/ajassp.2013.1307.1314

Abstract

Natural fibre materials are one of the major ways to improve environmental pollution and new materials need to be considered to find the best solutions. This study presents an experimental investigation on pure micro porous materials from two types of fibers: Date Palm Fibre (DPF) and Coconut Coir Fibre (CCF). This study was conducted to examine the potential for using these two types of fibers as sound absorbers. To account for the effects of the characteristics of these materials, such as thickness and density, on the acoustic absorption coefficient of a sound absorber, the measurements were conducted in an impedance tube on normal incidence acoustic absorption. The experimental data indicate that two peak values of Acoustic Absorption Coefficient (AAC) are 0.98 at 1381.25 Hz-1506.25 Hz for the 40 mm thick sample and the AAC at high frequency for the same thickness is 0.99 at 4521.88-4906.25 Hz; for 20 mm thickness, the peak value is 0.84 at 2606.25-3025 Hz. The AAC of the CCF sample is 0.77 at 2434.38-2543.75 Hz for a 40 mm thickness, but for 20 mm thickness, the value is 0.71 at 4184.38-4575 Hz. The Acoustic Absorption Coefficients (AAC) of the two types of materials were increased at all frequencies when the thickness of the sample was increased. The results show that date palm fibre and coconut coir fibre have good acoustic properties at low and high frequencies and can be used as an alternative replacement to conventional products. The comparisons between the two panels show a good potential because they are cheaper and lighter in comparison to asbestos and rock wool industrial materials.

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Keywords

  • Date Palm Fibre
  • Coconut Coir Fibre
  • Acoustic Absorption Coefficient
  • Density
  • Thickness