Empirical Modeling of Sound Absorption Properties of Natural Nonwoven Fabric (Antiaris toxicaria Barkcloth)

The desire to mitigate climate change due to greenhouse gas emissions has led to the exploration of plant fibers as alternative materials for various industrial applications acoustics inclusive. In this investigation, sound absorption properties of barkcloth, a nonwoven fabric from Antiaris toxicaria were characterized. Theoretical empirical sound absorption models based on Delany and Bazley such as Miki, Wu and Allard – Champoux were utilized to validate the experimental data. The empirical models were in agreement with experimental data; Incorporation of an air-gap between the fabric layers had a positive influence on the overall sound absorption behavior of barkcloth fabrics rendering the fabric a good sound absorption material.

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Effect of physiochemical structure on energy absorption properties of plant fibers reinforced composites: Dielectric, thermal insulation, and sound absorption properties

Composites Communications ◽

10.1016/j.coco.2018.09.006 ◽

2018 ◽

Vol 10 ◽

pp. 163-167 ◽

Cited By ~ 9

Author(s):

Shanping Zhang ◽

Yan Li ◽

Zhuoyuan Zheng

Keyword(s):

Energy Absorption ◽

Thermal Insulation ◽

Sound Absorption ◽

Reinforced Composites ◽

Absorption Properties ◽

Plant Fibers

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Investigation Of Sound Absorption Properties Of Bark Cloth Nonwoven Fabric And Composites

Autex Research Journal ◽

10.1515/aut-2015-0010 ◽

2015 ◽

Vol 15 (3) ◽

pp. 173-180 ◽

Cited By ~ 11

Author(s):

Samson Rwawiire ◽

Blanka Tomkova ◽

Eulalia Gliscinska ◽

Izabella Krucinska ◽

Marina Michalak ◽

...

Keyword(s):

Sound Absorption ◽

Epoxy Polymer ◽

Nonwoven Fabric ◽

Natural Fibre ◽

Woven Fabric ◽

Absorption Properties ◽

Fibre Network ◽

Exploratory Investigation ◽

Absorbing Materials ◽

Fibre Morphology

AbstractThe quest for sound-absorbing materials that are not only environmentally friendly, but also sustainable is the foremost reason for natural fibre-acoustic materials. Bark cloth is a natural non-woven fabric that is largely produced from Ficus trees. An exploratory investigation of bark cloth a non-woven material and its reinforcement in epoxy polymer composites has been fabricated and investigated for the sound absorption properties so as to find the most suitable applications and also to see whether bark cloth can be used in some applications in place of man-made fibres. Three types of material species were investigated with their respective composites. The fibre morphology showed bark cloth to be a porous fabric that showed promising sound absorption properties at higher frequencies. The sound absorption results of four-layer material selections of Ficus natalensis, Ficus brachypoda and Antiaris toxicaria bark cloth showed sound absorption coefficient of 0.7; 0.71 and 0.91 at f > 6400 Hz, respectively. The bark cloth reinforced laminar epoxy composites had reduced sound absorption coefficients, which ranged from 0.1 to 0.35, which was attributed to decreased porosity and vibration in the bark cloth fibre network.

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Sound absorption properties of nonwoven fabric based multi‐layer composites

Polymer Composites ◽

10.1002/pc.24981 ◽

2018 ◽

Vol 40 (5) ◽

pp. 2012-2018 ◽

Cited By ~ 5

Author(s):

Xiaoning Tang ◽

Xiansheng Zhang ◽

Xingmin Zhuang ◽

Huiping Zhang ◽

Xiong Yan

Keyword(s):

Sound Absorption ◽

Nonwoven Fabric ◽

Absorption Properties

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Multi-layered sound absorption structure composed of nonwoven fabrics and polyethylene membranes

Journal of Industrial Textiles ◽

10.1177/1528083720961950 ◽

2020 ◽

pp. 152808372096195

Author(s):

Xiaoning Tang ◽

Xueting Liu ◽

Xiansheng Zhang ◽

Shangyong Zhang

Keyword(s):

Sound Absorption ◽

Nonwoven Fabric ◽

Multilayered Structure ◽

Acoustic Measurement ◽

Stacking Sequence ◽

Absorption Coefficients ◽

Absorption Properties ◽

Nonwoven Fabrics ◽

Layer Stacking ◽

Different Thickness

This work has focused on the improvement of the sound absorption properties of multilayered structure. Nonwoven fabrics with three different thickness were used to fabricate multilayered absorber. Polyethylene membrane was then incorporated into the multilayered structure with different combinations. The acoustic measurement indicated that polyethylene membrane can improve the sound absorption properties when the thickness of nonwoven fabric is 1.01 mm and 2.38 mm respectively. However, the incorporation of polyethylene membrane will decrease the sound absorption coefficients when the thickness of nonwoven fabric is 3.41 mm. This study has indicated that the thickness of nonwoven fabric and the layer stacking sequence should be focused on consideration to prepare multilayered sound absorber.

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Experimental and Modelling Studies on Thermal Insulation and Sound Absorption Properties of Cross-Laid Nonwoven Fabrics

Autex Research Journal ◽

10.2478/aut-2021-0012 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Tao Yang ◽

Lizhu Hu ◽

Xiaoman Xiong ◽

Michal Petrů ◽

Sundaramoorthy Palanisamy ◽

...

Keyword(s):

Thermal Conductivity ◽

Absorption Coefficient ◽

Thermal Insulation ◽

Sound Absorption ◽

Nonwoven Fabric ◽

Sound Absorption Coefficient ◽

Absorption Properties ◽

Nonwoven Fabrics ◽

Significant Difference ◽

Modelling Studies

Abstract Nonwoven fabrics are widely used for thermal insulation and sound absorption purpose in construction and automobile fields. It is essential to investigate their thermal conductivity and sound absorption coefficient. Five cross-laid nonwoven fabrics are measured on the Alambeta device and Brüel & Kjær impedance tube. Bogaty and Bhattacharyya models are selected to predict the thermal conductivity, and Voronina and Miki models are used to predict the sound absorption coefficient. The predicted thermal conductivity shows a significant difference compared with the measured values. It is concluded that Bogaty and Bhattacharyya models are not suitable for high porous nonwoven fabric. In addition, the results of Voronina and Miki models for sound absorption prediction are acceptable, but Voronina model shows lower mean prediction error compared with Miki model. The results indicate that Voronina model can be used to predict the sound absorption of cross-laid nonwoven fabric.

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Preparation of natural bio-based Eucommia ulmoides gum/styrene-butadiene rubber composites and the evaluation of their damping and sound absorption properties

Polymer ◽

10.1016/j.polymer.2020.123292 ◽

2021 ◽

Vol 213 ◽

pp. 123292

Author(s):

Renwei Cao ◽

Linhui Deng ◽

Zhibo Feng ◽

Xiuying Zhao ◽

Xiaolin Li ◽

...

Keyword(s):

Sound Absorption ◽

Styrene Butadiene Rubber ◽

Eucommia Ulmoides ◽

Butadiene Rubber ◽

Rubber Composites ◽

Absorption Properties ◽

Eucommia Ulmoides Gum ◽

Styrene Butadiene

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Acoustic Panels Made of Paper Sludge and Clay Composites

Sustainability ◽

10.3390/su13020637 ◽

2021 ◽

Vol 13 (2) ◽

pp. 637

Author(s):

Tomas Astrauskas ◽

Tomas Januševičius ◽

Raimondas Grubliauskas

Keyword(s):

Absorption Coefficient ◽

Sound Absorption ◽

Composite Panel ◽

Sound Absorption Coefficient ◽

Core Material ◽

Paper Sludge ◽

Frequency Range ◽

Absorption Properties ◽

Air Gaps ◽

The Core

Studies on recycled materials emerged during recent years. This paper investigates samples’ sound absorption properties for panels fabricated of a mixture of paper sludge (PS) and clay mixture. PS was the core material. The sound absorption was measured. We also consider the influence of an air gap between panels and rigid backing. Different air gaps (50, 100, 150, 200 mm) simulate existing acoustic panel systems. Finally, the PS and clay composite panel sound absorption coefficients are compared to those for a typical commercial absorptive ceiling panel. The average sound absorption coefficient of PS-clay composite panels (αavg. in the frequency range from 250 to 1600 Hz) was up to 0.55. The resulting average sound absorption coefficient of panels made of recycled (but unfinished) materials is even somewhat higher than for the finished commercial (finished) acoustic panel (αavg. = 0.51).

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