Acoustic absorptive properties of Kapok fiber, Kapok fiber layered tricot fabric and Kapok fiber layered double weave fabric

Makki, Achmad Ibrahim; Oktariani, Erfina

doi:10.1088/1742-6596/1381/1/012065

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…The most important of them are glass wool, foam and mineral fibers (Süvari, 2020;Xiang et al, 2013;Ersoy and Küçük, 2009). In addition to these commercial materials, there are many studies on the use of different textile structures in sound insulation (Özdil et al, 2020;Lim et al, 2018;Makki and Oktariani, 2019;Kaya and Dalgar, 2017;Küçük and Korkmaz, 2012). While the sound absorption properties of cotton and kenaf fibers are similar to rock wool (Lim et al, 2018;Oldham et al, 2011) coconut fiber is known to have high sound absorption at low and medium frequencies (Berardi and Iannace, 2015).…”

Section: Introductionmentioning

confidence: 99%

151 Evaluation of Acoustic Performance of Hemp and Cotton Fiber Reinforced Thermoplastic Composites

Sezgin¹,

DURU²,

Candan³

2022

Uludağ University Journal of the Faculty of Engineering

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In a developing and increasing world, the increment in the consumption of natural resources brings environmental problems together. The use of plant raw materials has great importance in the construction industry, which has a high consumption rate. Increasing demand to develop sustainable and environmentally friendly materials has increased the use of natural fibers in sustainable building materials (sound absorption, heat and sound insulation). The fact that hemp fiber does not have high water consumption in the production, can be grown without the need for fertilizers and pesticides, as well as leaving a rich soil structure for the next crop by destroying weeds ensures the protection of the soil and the environment. From this point of view, in this study sound insulation properties of hemp fiber reinforced composites were investigated. Polypropylene fiber was used as a matrix material. To compare the performance of hemp fiber, cotton fiber was also utilized and different constructions were produced from these materials. The composites were produced by the hot-press method. It was found that the composites made of hemp fiber showed significantly higher sound insulation than the cotton fiber reinforced composites and can be used as a sound isolation material at specific high frequencies.

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Section: Introductionmentioning

confidence: 99%

151 Evaluation of Acoustic Performance of Hemp and Cotton Fiber Reinforced Thermoplastic Composites

Sezgin¹,

DURU²,

Candan³

2022

Uludağ University Journal of the Faculty of Engineering

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“…They found that since kapok fiber has a high degree of hollow and small fiber diameter, it is an excellent sound absorption. Combination of kapok with knitted fabric is also investigated by Makki and Oktariani [12]. Many other researchers, such as Mamtaz et al [13], Or et al [14], and Borell et al [15] also investigated the use of natural fiber that offers good sound absorption and poses environmental-friendly material.…”

Section: Introductionmentioning

confidence: 99%

Influence of Surface Discontinuity on Sound Absorption Coefficient of Vehicle Interior Material

Mohamed

Sulaeman

Dianne

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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There has been considerable effort in the automotive industry to reduce and control the noise in the car cabin. Selecting or designing a better absorber will enhance the comfort of the passengers in the car. There are many techniques to reduce or control the noise in the car cabin. One of the techniques is to place specific material in order to reduce its acoustical noise. This paper presents a study on sound absorption of the felt, polyurethane foam and fabric which are commonly used as car interior material. Furthermore, the influence of surface discontinuity created between two joined material parts is also investigated. The sound absorption coefficient is measured using two-microphone impedance tube. This tube is used to provide noise source frequency ranging from 50 Hz to 10 kHz. Using the dBAlpha software that is connected to the microphone via Symphonie Analyzer, the sound absorption coefficient of the material for every frequency is presented in tabular as well as in graphical form. The test results show that material selection is significantly important for the absorption of noise. Besides, it is found that the surface discontinuity gives different effect depending on the material. For the felt material, the surface discontinuity has insignificant effect. However, the surface discontinuity may give a moderate effect for other materials such as polyurethane foam and fabric.

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“…Liu et al [16] developed a sound-absorbing nonwoven composite material based on kapok fibre and hollow polyester fibre, and used the impedance tube method to study the sound-absorbing performance of kapok fibre nonwoven composite material in the low-frequency region of 100-500 Hz. Makki et al [17] studied the sound-absorption properties of nonwoven, layered warp knitting, and layered double-layer fabric made of kapok fibre at frequencies from 100 to 5000 Hz. The results showed that the best sound-absorption effect was obtained by combining kapok nonwovens with double-layer fabric with a thickness of 11.25 mm.…”

Section: Introductionmentioning

confidence: 99%

Sound-Absorption Performance and Fractal Dimension Feature of Kapok Fibre/Polycaprolactone Composites

et al. 2021

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This article introduces a kind of composite material made of kapok fibre and polycaprolactone by the hot-pressing method. The effects of volume density, mass fraction of kapok fibre, and thickness on the sound-absorption performance of composites were researched using a single-factor experiment. The sound-absorption performance of the composites was investigated by the transfer function method. Under the optimal process parameters, when the density of the composite material was 0.172 g/cm3, the mass fraction of kapok was 40%, and the thickness was 2 cm, the composite material reached the maximum sound-absorption coefficient of 0.830, and when the sound-absorption frequency was 6300 Hz, the average sound-absorption coefficient was 0.520, and the sound-absorption band was wide. This research used the box dimension method to calculate composites’ fractal dimensions by using the Matlab program based on the fractal theory. It analysed the relationships between fractal dimension and volume density, fractal dimension and mass fraction of kapok fibre, and fractal dimension and thickness. The quantitative relations between fractal dimension and maximum sound-absorption coefficient, fractal dimension, and resonant sound-absorption frequency were derived, which provided a theoretical basis for studying sound-absorption performance. The results showed that kapok fibre/polycaprolactone composites had strong fractal characteristics, which had important guiding significance for the sound-absorption performance of kapok fibre composites.

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Acoustic absorptive properties of Kapok fiber, Kapok fiber layered tricot fabric and Kapok fiber layered double weave fabric

Cited by 5 publications

References 7 publications

151 Evaluation of Acoustic Performance of Hemp and Cotton Fiber Reinforced Thermoplastic Composites

151 Evaluation of Acoustic Performance of Hemp and Cotton Fiber Reinforced Thermoplastic Composites

Influence of Surface Discontinuity on Sound Absorption Coefficient of Vehicle Interior Material

Sound-Absorption Performance and Fractal Dimension Feature of Kapok Fibre/Polycaprolactone Composites

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