Abstract The use of plant fibers for acoustic applications in the industrial sector is increasing nowadays due to: their porous nature, hollow lumen structure, and the presence of Nano-fibrils. The current investigation aims to analyze the influence of jute fiber length and various chemical treatments on the sound absorption property. The sound absorption coefficient was measured by the Impedance tube method. From the results, it was found that 20 mm fiber length has the uppermost sound absorption coefficient at all frequencies, due to the increase in the number of air cavities and nanofibrils. Further, the 20 mm length fiber was surface modified by NaOH, NaHCO3 and Cr2SO4 respectively and the sound absorption coefficient of the surface modified fibers was analyzed. The result showed that among the various chemical treatments, alkali treated fiber has the maximum sound absorption coefficient than the other treated fibers. The SEM images revealed that the chemical modification causes changes in the morphology of fibers. In addition, the comparative study of the experimental and theoretical sound absorption coefficient showed good agreement between them.

中文翻译：

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纤维长度和表面改性对黄麻纤维声学行为的影响

摘要 如今，植物纤维在工业领域的声学应用中的使用越来越多，原因是它们的多孔性、中空管腔结构和纳米原纤维的存在。目前的调查旨在分析黄麻纤维长度和各种化学处理对吸声性能的影响。吸声系数通过阻抗管法测量。从结果中发现，由于空气腔和纳米纤维数量的增加，20 mm 的纤维长度在所有频率下具有最高的吸声系数。此外，分别用NaOH、NaHCO3和Cr2SO4对20mm长的纤维进行表面改性，并分析了表面改性纤维的吸声系数。结果表明，在各种化学处理中，碱处理过的纤维比其他处理过的纤维具有最大的吸声系数。SEM 图像显示化学改性导致纤维形态发生变化。此外，实验吸声系数与理论吸声系数的对比研究表明，两者具有良好的一致性。