Acoustic properties of natural fiber of oil palm trunk

Raman, K.; Sheng, Ewe Lay; Zaroog, Omar Suliman; Woon, Hai Song; Ibrahim, Zelina Zaiton

doi:10.21833/ijaas.2018.06.013

Cited by 10 publications

(8 citation statements)

References 6 publications

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“…Sound Absorption Coefficient, SAC (α) is a fraction of sound energy that being absorbed. The values are expressed as numbers between 0.0 to 1.0, as (0.0) stands for total reflection of unwanted sound and (1.0) stands for perfect absorption [3]. Figure 1 shows the SAC values of the LDF in thickness of 12 mm, 14 mm, 16 mm and 18 mm.…”

Section: Resultsmentioning

confidence: 99%

“…Many researches towards natural fibres have been done and explored on its acoustic properties in recent years [3 -12]. Oil Palm Trunk (OPT) [3], Oil Palm Empty Fruit Bunch (EFB) [4], Arenga Pinnata [5], Coconut coir [6], Kapok [7], Paddy straw [8], Kenaf [9], Bamboo fibre [10], Mesocarp [11] and etc. These studies showed that the acoustic properties of natural fibre are good enough to replace the synthetic fibre.…”

Section: Introductionmentioning

confidence: 99%

“…It is not only good in acoustic properties but also renewable, biodegradable and ecological. These are the main reason of why natural fibres are being chosen as they have such beneficial properties to the environment and can be exploited [3] [12].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Acoustic Properties of Mixing Empty Fruit Bunch and Oil Palm Frond Natural Fibres

Mageswaran¹,

Sheng²,

Yew³

et al. 2019

IJRTE

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Natural fibre is being studied and used as sound absorber for its promising acoustic properties. For instance, Germany have commercial plants that are producing sound absorbers from natural fibre. Natural fibre is eco-friendly and has no effect on human health. Besides that, the production cost of natural fibre is cheaper than synthetic fibre. This research reported the thickness effects on acoustic properties in different ratios of natural fibres of empty fruit bunch (EFB) and oil palm frond (OPF). Four different thickness of low density fibre board (LDF) have been fabricated (12 mm, 14 mm, 16 mm and 18 mm) in density of 120 kg/m3 . The Sound Absorption Coefficient (SAC) was tested by using the Impedance Tube Method (ITM) according to ASTM E1050-98 standards at frequency from 0 Hz to 6400 Hz. The results show the values of SAC for all samples increase with increasing in thickness from frequency range of 0 Hz – 4500 Hz. It is noteworthy that the LDF with thickness of 16 mm and 18 mm can be classified as Class A sound absorbing material according to sound absorption classes and possess the SAC values of 0.8 and above at a wider frequency range, which is 2500 Hz to 6400 Hz. The combination of EFP and OPF natural fibres has a very promising and excellent performance in acoustic properties.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Acoustic Properties of Mixing Empty Fruit Bunch and Oil Palm Frond Natural Fibres

Mageswaran¹,

Sheng²,

Yew³

et al. 2019

IJRTE

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“…The sample’s maximum SAC (alpha) value was 0.99 under these circumstances. When compared to synthetic-based commercial products, the OPT experimental trial findings reveal that it has excellent acoustic characteristics [ 109 ].…”

Section: Sound Absorption Behavior Of Polymer Compositesmentioning

confidence: 99%

A Critical Review on Hygrothermal and Sound Absorption Behavior of Natural-Fiber-Reinforced Polymer Composites

et al. 2022

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Increasing global environmental problems and awareness towards the utilization of eco-friendly resources enhanced the progress of research towards the development of next-generation biodegradable and environmentally friendly material. The development of natural-based composite material has led to various advantages such as a reduction in greenhouse gases and carbon footprints. In spite of the various advantages obtained from green materials, there are also a few disadvantages, such as poor interfacial compatibility between the polymer matrix and natural reinforcements and the high hydrophilicity of composites due to the reinforcement of hydrophilic natural fibers. This review focuses on various moisture-absorbing and sound-absorbing natural fiber polymer composites along with the synopsis of preparation methods of natural fiber polymer composites. It was stated in various studies that natural fibers are durable with a long life but their moisture absorption behavior depends on various factors. Such natural fibers possess different moisture absorption behavior rates and different moisture absorption behavior. The conversion of hydrophilic fibers into hydrophobic is deemed very important in improving the mechanical, thermal, and physical properties of the natural-fiber-reinforced polymer composites. One more physical property that requires the involvement of natural fibers in place of synthetic fibers is the sound absorption behavior. Various researchers have made experiments using natural-fiber-reinforced polymer composites as sound-absorbing materials. It was found from various studies that composites with higher thickness, porosity, and density behaved as better sound-absorbing materials.

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“…Ciri demikian berpotensi sebagai bahan penyerap suara berpori atau sebagai resonator Helmholtz. Namun untuk meningkatkan kinerjanya perlu memodifikasinya terlebih dahulu [10][11][12].…”

Section: Latar Belakangunclassified

Perluasan Kinerja Akustik Limbah Kayu Batang Kelapa Sawit Termodifikasi Bahan Formaldehida

Manik

Shaliha²,

Siregar³

et al. 2022

Positron

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Chemical modifications for waste oil palm trunks had carried out as acoustic material. This modification was conducted in two stages. Firstly, formalization with formaldehyde solution and secondly is impregnation with melamine-formaldehyde resin. Formalization was conducted in alkaline condition (pH 10) for 3 days and 5 days. Impregnation was carried out under pressure 3 bar and 5 bar and held for an hour. For completed these modification, the samples was cured at 120oC for 10 minutes and then dried at (103±2)oC to reached moisture content of less than 6%. This modification has changed the chemical structure and the morphology of wood, as shown by the FTIR and SEM results. The samples became denser, stronger and more rigid. Furthermore, the mechanical and physical properties of modified wood are also increasing. The absorption coefficient decreases with increasing formalization time and impregnation pressure. Based on trend of absorption coefficient, BKS wood can be applicated as resonant absorber with work class from A to class B and D.

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Acoustic properties of natural fiber of oil palm trunk

Cited by 10 publications

References 6 publications

Acoustic Properties of Mixing Empty Fruit Bunch and Oil Palm Frond Natural Fibres

Acoustic Properties of Mixing Empty Fruit Bunch and Oil Palm Frond Natural Fibres

A Critical Review on Hygrothermal and Sound Absorption Behavior of Natural-Fiber-Reinforced Polymer Composites

Perluasan Kinerja Akustik Limbah Kayu Batang Kelapa Sawit Termodifikasi Bahan Formaldehida

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