The Acoustic Performance of Natural Composites in Reducing Stress Levels: Textile Industry

Q3 Engineering

Open Civil Engineering Journal Pub Date : 2023-06-01 DOI:10.28991/cej-2023-09-06-02

M. P. Widjanarti, A. Probandari, .. Sumardiyono, .. Sunarto

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引用次数: 0

Abstract

The porous characteristics of recycled natural fibres make them suitable for use as acoustic materials. Straw and water hyacinth fibres are natural materials that can potentially be used as composites in damping devices. This study evaluated the acoustic performance of two types of reinforced composites containing natural fibers (water hyacinth and rice straw) and gypsum adhesives in reducing stress levels in the textile industry. The evaluation was carried out through laboratory tests using impedance tubes and direct testing in a textile factory to reduce the stress level of production machine workers and operators. Rice straw and water hyacinth fibres were thoroughly mixed in proven mass ratios of 10% and 30% with water and gypsum plaster as a binder. The mixture was pressed into a mould at a pressure of 3 MPa before being heated in an oven at 900ºC for 5 hours. Perforations measuring 4 to 8 mm in diameter were then made at equal distances on the panels. Acoustic panel performance tests were carried out with impedance tubes according to ISO 10534-2 standards at sound frequencies ranging from 0 to 6400 Hz. Field tests were also conducted at a textile factory, with each machine unit generating a sound source of 100 to 110 dB. Heart rate data was collected, and noise measurements were carried out before and after the panels were installed in the area around the operating machines. The results showed that the rice straw-gypsum composite with four perforations performed the best, achieving an α coefficient of 1.0 at a frequency of 1500 Hz and an NRC of 0.50, indicating effective noise reduction. The installation of acoustic panels around the noise source in the textile industry reduced noise levels by up to 9.8 dB and was found to affect workers' heart rates, indicating reduced stress levels. The questionnaire results also showed a significant effect on the stress levels of workers. The use of natural fibers in composite materials has the potential to be an eco-friendly and sustainable solution for soundproofing applications. Doi: 10.28991/CEJ-2023-09-06-02 Full Text: PDF

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天然复合材料在降低应力水平中的声学性能:纺织工业

再生天然纤维的多孔特性使它们适合用作声学材料。稻草和水葫芦纤维是天然材料，可以用作阻尼装置的复合材料。本研究评估了两种含有天然纤维(水葫芦和稻草)和石膏粘合剂的增强复合材料在减少纺织工业压力水平方面的声学性能。评估是通过使用阻抗管的实验室测试和在一家纺织厂进行的直接测试来进行的，以减少生产机器工人和操作员的压力水平。稻秆和水葫芦纤维以10%和30%的质量比与水和石膏作为粘合剂彻底混合。将混合物压入压力为3mpa的模具中，然后在900℃的烘箱中加热5小时。然后在面板上以相等的距离进行直径为4至8毫米的穿孔。根据ISO 10534-2标准，在0至6400 Hz的声音频率范围内，使用阻抗管进行了声学面板性能测试。还在一家纺织厂进行了现场试验，每个机器单元产生100至110 dB的声源。收集了心率数据，并在操作机器周围的区域安装面板前后进行了噪音测量。结果表明，4孔的稻草石膏复合材料降噪效果最好，在1500 Hz频率下α系数为1.0,NRC为0.50，降噪效果显著。在纺织业的噪声源周围安装隔音板，可减少高达9.8分贝的噪音水平，并发现可影响工人的心率，表明压力水平降低。问卷调查结果也显示了对员工压力水平的显著影响。在复合材料中使用天然纤维有可能成为环保和可持续的隔音应用解决方案。Doi: 10.28991/CEJ-2023-09-06-02全文:PDF

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来源期刊

Open Civil Engineering Journal Engineering-Civil and Structural Engineering

CiteScore

1.90

自引率

0.00%

发文量

期刊介绍： The Open Civil Engineering Journal is an Open Access online journal which publishes research, reviews/mini-reviews, letter articles and guest edited single topic issues in all areas of civil engineering. The Open Civil Engineering Journal, a peer-reviewed journal, is an important and reliable source of current information on developments in civil engineering. The topics covered in the journal include (but not limited to) concrete structures, construction materials, structural mechanics, soil mechanics, foundation engineering, offshore geotechnics, water resources, hydraulics, horology, coastal engineering, river engineering, ocean modeling, fluid-solid-structure interactions, offshore engineering, marine structures, constructional management and other civil engineering relevant areas.