This review covers an alternative material known as natural fibre that can be used to replace synthetic fibre as core material for the production of sound absorber. The review explored natural fibre such as bamboo fibre, arenga pinnata, paddy straw fibre, oil palm mesocarp fibre, and kenaf fibre in terms of acoustic properties such as sound absorption coefficient. It has been found that plenty of research regarding the utilization of natural fibre for sound absorption purposes have been accomplished. The implementation of natural fibre in producing sound absorber brings many environmental benefit as it is much greener compared to existing material such as synthetic fibre. Apart from that, natural fibre does not impose any serious health effect compared to the existing synthetic fibre.
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Yahya et al. (2017) studied this question.
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