期刊
SOUND AND VIBRATION
卷 55, 期 4, 页码 343-352出版社
TECH SCIENCE PRESS
DOI: 10.32604/sv.2021.014916
关键词
Acoustics; micro-perforated panel; natural fiber reinforced composite; laser cutting; impedance tube
资金
- Taylor's University Flagship Research Grant [TUFR/2017/001/05]
This paper investigates the development and performance of micro-perforated panels (MPP) made of Polylactic Acid (PLA) reinforced with Oil Palm Empty Fruit Bunch Fiber (OPEFBF) on the Sound Absorption Coefficient (SAC). The study found that changes in fiber density, air gap, and perforation ratio can shift the peaks of acoustic absorption, affecting the noise reduction effectiveness.
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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