Abstract
This paper presents the sound and vibration damping properties of nonwoven flax reinforced acrylic based polyester composites. This research attempt to solve the problem of synthetic fibre which caused environmental problems. the goal of is study to characterize the sound absorption and damping properties of the natural fibre at difference thickness and pressure. the nonwoven flax reinforced acrylic based polyester composites are produced by using moulding machines at different compression pressures that are 10, 20 and 30 bars. the thicknesses of samples used in this study are 2 mm and 3 mm. the measurement of sound absorption of the material is carried out using impedance tube. For the sample with 2 mm thickness, the result shows that the maximum sound absorption of 0.93 was observed at frequency of 853 Hz and pressure of 20 bars. Damping values are calculated and measure for each sample. the result shows that damping factor is obtained is 0.039 and 0.052 for thickness materials of 2mm and 3mm.
Highlights
Today, noise pollution has become a new pollution source that caused bad influence to the environment, human health and national economy
The absorption performance of industrial waste tea leaf fibre has been studied by Ersoy and Kucu [6]
Increasing the pressure can further enhance the sound absorption coefficient. These results suggest that the nonwoven flax reinforced composites could be viable candidate for applications which need of good sound and vibration properties
Summary
Noise pollution has become a new pollution source that caused bad influence to the environment, human health and national economy. Researchers have carried out various noise control methods for investingating the issue. The mechanism of controlling noise included active control and passive control [1]. Researchers have focus on natural fibers such as kenaf, ramie and jute reinforced composites. The reason is good mechanical properties, light weight, environmentally friendly and biodegradable [2,3]. Multiple layered coir fiber absorbers involving air spaces and micro-perforated plate has been studied both through simulation and experiments [4,5]. The absorption performance of industrial waste tea leaf fibre has been studied by Ersoy and Kucu [6]
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