Development and acoustical analysis using kenaf and coconut fibres at different fibre loading

Lim, Reo Sei (2016) Development and acoustical analysis using kenaf and coconut fibres at different fibre loading. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Acoustic study in this research is the sound absorption coefficient of kenaf and coconut hybrid natural composite at low, medium and high frequency range. As the noise has been another major concern of pollution in this globalization. In addition, the obstacles in using passive sound absorbing material is to achieve high sound absorption coefficient in low frequency range that is within 0 to 1500 Hz in general. Furthermore reduction of coconut plantation that gradually replace by other commodity plant such as kenaf also a factor that lead to this research as to determine alternative route to produce natural sound absorption material.to replace synthetic sound absorbing material. This research uses kenaf and coconut mixing at different fibre loading with natural rubber latex as binder to measure the sound absorption coefficient using impedance tube method experiment that compliance to ASTM E1050-98 (2006) with reference to ISO standard 10534-1. The expectation in the findings of this experiment is the optimum fibre loading of kenaf and coconut with high sound absorption coefficient at high and medium frequency range. The study found that as kenaf fibre loading increase, the sound absorption coefficient increase, meanwhile the thickness of the sample influence the sound absorption coefficient peak by shifting to lower frequency range.

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