ABSTRACT

This paper highlights the sound absorption performance of microperforated panel (MPP) made from coconut fiber and polylactic acid (PLA) composite named as biocomposite microperforated panel (BMPP). Coconut fiber was used to produce BMPP specimen and PLA was used as matrix. Impedance tube method was employed to identify the sound absorption performance of BMPP specimen while a porosity tester was used to determine the porosity of BMPP specimen. Comparison on the sound absorption performance between BMPP and steel MPP will be discussed in this paper. It has been found that BMPP with different composition percentage of coconut fiber and PLA possessed different sound absorption performance mainly due to the existence of pores and tortuous structure within the specimen itself. Scanning electron microscope (SEM) scan was performed to further analyze the structure of BMPP specimen.

摘要

本文重点介绍了由椰子纤维和聚乳酸 (PLA) 复合材料制成的微穿孔板 (MPP) 的吸声性能，称为生物复合材料微穿孔板 (BMPP)。椰子纤维用于制作BMPP试样，PLA作为基质。采用阻抗管法鉴定BMPP试件的吸声性能，并采用孔隙率测试仪测定BMPP试件的孔隙率。本文将讨论BMPP和钢制MPP之间的吸声性能比较。研究发现，椰子纤维和PLA不同组成百分比的BMPP具有不同的吸声性能，这主要是由于试样本身存在孔隙和曲折结构。