Open Access

ARTICLE

Acoustic Properties of Micro-Perforated Panels Made from Oil Palm Empty Fruit Bunch Fiber Reinforced Polylactic Acid

by Vignesh Sekar^1,*, Se Yong Eh Noum¹, Azma Putra², Sivakumar Sivanesan¹, Kok Chun Chin¹, Yi San Wong¹, Dg Hafizah Kassim³

1 School of Computer Science and Engineering, Taylor’s University, Subang Jaya, 47500, Malaysia
2 Centre for Advanced Research on Energy, Universiti Teknikal Malaysia Melaka (UTeM), Melaka, 76100, Malaysia
3 Fakulti Kejuruteraan Mekanikal, Universiti Teknikal Malaysia Melaka (UTeM), Melaka, 76100, Malaysia

* Corresponding Author: Vignesh Sekar. Email:

Sound & Vibration 2021, 55(4), 343-352. https://doi.org/10.32604/sv.2021.014916

Received 07 November 2020; Accepted 22 July 2021; Issue published 18 October 2021

Abstract

This paper presents the development and performance of micro-perforated panels (MPP) from natural fiber reinforced composites. The MPP is made of Polylactic Acid (PLA) reinforced with Oil Palm Empty Fruit Bunch Fiber (OPEFBF). The investigation was made by varying the fiber density, air gap, and perforation ratio to observe the effect on the Sound Absorption Coefficient (SAC) through the experiment in an impedance tube. It is found that the peak level of SAC is not affected, but the peak frequency shifts to lower frequency when the fiber density is increased. This phenomenon might be due to the presence of porosity in the inner wall of the holes. Increasing or decreasing the air gap and perforation ratio shifts the peaks of acoustic absorption either way.

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Keywords

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