Pengaruh Orientasi Serat Terhadap Redaman Suara  Komposit Berpenguat Serat Pinang

Pratiwi, Putri; Fahmi, Hendriwan; Saputra, Fiko

doi:10.24176/simet.v8i2.1617

Cited by 5 publications

(5 citation statements)

References 1 publication

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“…After the fiber is cleaned, the fiber is then dried in the sun for 1 day. After drying, the fiber is cut into 3 cm lengths [21]. Pineapple leaf fibers that are 3 cm in size are then soaked in a 5% NaOH solution for 2 hours [22].…”

Section: Methodsmentioning

confidence: 99%

Effect of Variation in Pineapple Leaf Fiber Composition with Polyurethane Matrix in Composite Panels on Acoustic Properties and Porosity

Adil,

Darvina,

Ramli

et al. 2023

Pillar of Phys.

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Noise can cause medical, psychological, and environmental disturbances. One of the efforts to reduce noise is by using acoustic materials. Acoustic materials can be made using natural fiber composites. This study uses pineapple leaf fiber as fiber and polyurethane as a matrix that will be formed into a sound-absorbing composite panel. This study aims are to determine the effect of variations in the composition of pineapple fiber-reinforced composites with polyurethane matrix on acoustic properties and porosity, determine the effect of frequency on acoustic properties, and determine the relationship between porosity and acoustic properties. The method used in this research uses a characterization tool in the form of a one-microphone impedance tube and porosity test equipment. Composite panels are made by varying the composition of pineapple leaf fibers with polyurethane matrix with the ratio of pineapple leaf fiber composition to polyurethane matrix, namely 50%: 50%, 60%: 40%, 70%: 30%, 80%: 20% and 90%: 10%. Based on the research, it was found that the more the amount of pineapple leaf fiber composition is used, the absorption coefficient, sound transmission loss, and prostitution will increase while the reflection coefficient decreases. The higher the frequency used, the absorption coefficient and sound transmission loss will increase while the reflection coefficient decreases for all frequencies. The relationship between porosity and acoustic properties is that the higher the porosity, the absorption coefficient and sound transmission loss will increase while the reflection coefficient decreases

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Section: Methodsmentioning

confidence: 99%

Effect of Variation in Pineapple Leaf Fiber Composition with Polyurethane Matrix in Composite Panels on Acoustic Properties and Porosity

Adil,

Darvina,

Ramli

et al. 2023

Pillar of Phys.

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“…Semakin banyak perekat yang ditambahkan pada sebuah komposit menyebabkan komposit memiliki ruang kosong (porositas) yang lebih sedikit sehingga bunyi yang datang pada spesimen komposit tidak dapat terserap dengan baik. Seperti yang telah disampaikan pada penelitian-penelitian sebelumnya [8,11,12,13], bahwasanya keberadaan porositas/pori-pori membuat bunyi kehilangan energi kinetik saat melewati porositas/pori-pori tersebut. Energi kinetik yang hilang berubah menjadi panas saat partikel bunyi yang datang mengalami banyak gesekan dan getaran karena dipantulkan dalam porositas/pori-pori tersebut.…”

Section: Gambar 3 Grafik Hubungan Penambahan Fraksi Volume Perekat Ge...unclassified

The Effect of Volume Fraction on Acoustic Properties of Areca Nut Midrib Fibers Composites with Natural Adhesives

Pratiwi

Fahmi

Yanto

et al. 2020

JTM

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Areca nut Midrib is one of agricultural waste that has many benefits to be recycled for household purposes such as plates, jars and others. Moreover, for many researchers, areca nut midrib fiber was used as a filler of composites material. From several studies it is known that this material has good potential as filler in composites because of its good mechanical properties. In addition, this material is also considered as a good sound absorber. Therefore, this research will investigate the ability of sound absorption from this material in a various composition. We used Areca nut Midrib fibers as a filler and pine sap as a matrixof composite with a volume fraction of 70%: 30%, 75%: 25%, 80%: 20%, 85%: 15%, 90%: 10%. The sound absorption coefficient of composites was studied using impedance tube method with 500, 1000 Hz, 1500 Hz, 2000 Hz, and 2500 Hz frequency. The results showed that at a test frequency of 500 Hz, the value of sound absorption coefficient increases with the increase of Areca nut Midrib fraction. This research shown that there is an effect of volume fraction on the acoustic properties and Areca nut Midrib fiber composite have potential used as sound absorption materials, based on ISO standard 11654:1997.

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“…The natural fiber is a https://ejournal.walisongo.ac.id/index.php/perj/index good choice to be researched as a material for making acoustic materials. It is useful as a filler/reinforcing reinforcement in composite materials from natural materials (Pratiwi et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

The Natural Composite of Sawdust Teak as a Sound Absorption Materials Using The Resonator Space Method

Nurbaiti

Yulianto²,

Nurbaiti³

2022

PERJ

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The development of science and technology has resulted in the increasing use of sophisticated equipment that can produce unwanted sounds, resulting in noise. Acoustic materials are a solution that can reduce noise. This study aims to determine the sound absorption coefficient of a composite of teak sawdust and polyester resin as an environmentally friendly acoustic material. The sample was made in the form of a cylinder using a press of as many as six samples with a comparison of the mass fraction of teak sawdust and the mass fraction of polyester resin, namely sample 1 (30:70), sample 2 (40:60), sample 3 (50:50), sample 4 (60:40), sample 5(70:30), sample 6(80:20). The samples that have been made were tested using a resonance space and sound level meter to measure the value of the sound absorption coefficient (α) at frequencies of 500 Hz, 1000 Hz, 1500 Hz, 2000 Hz, 2500 Hz, and 3000 Hz. The optimal acoustic material sample in sample 1 with a fiber mass fraction of 30% and a sound absorption coefficient of 0.707 at a frequency of 3000 Hz.

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Pengaruh Orientasi Serat Terhadap Redaman Suara Komposit Berpenguat Serat Pinang

Cited by 5 publications

References 1 publication

Effect of Variation in Pineapple Leaf Fiber Composition with Polyurethane Matrix in Composite Panels on Acoustic Properties and Porosity

Effect of Variation in Pineapple Leaf Fiber Composition with Polyurethane Matrix in Composite Panels on Acoustic Properties and Porosity

The Effect of Volume Fraction on Acoustic Properties of Areca Nut Midrib Fibers Composites with Natural Adhesives

The Natural Composite of Sawdust Teak as a Sound Absorption Materials Using The Resonator Space Method

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