Effects of different parameters on acoustic properties of activated carbon fiber felts

Shen, Yuntian; Jiang, Gaoming

doi:10.1080/00405000.2013.813665

Cited by 13 publications

(5 citation statements)

References 32 publications

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“…[5] The acoustic properties of seven activated carbon fiber felts with different specifications are affected by structural factors such as thickness, bulk density, and fiber diameter. [6] The acoustic principle of both inorganic or organic absorption materials is similar. [7] Given that the acoustic waves propagating in the porous material cause viscous flow loss, the relative movement between molecules in the material causes friction and converts sound energy into heat energy loss.…”

Section: Introductionmentioning

confidence: 97%

Effect of Thickness, Density and Cavity Depth on the Sound Absorption Properties of Wool Boards

Qui

Yang

2018

Autex Research Journal

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A novel wool absorption board was prepared by using a traditional non-woven technique with coarse wools as the main raw material mixed with heat binding fibers. By using the transfer-function method and standing wave tube method, the sound absorption properties of wool boards in a frequency range of 250-6300 Hz were studied by changing the thickness, density, and cavity depth. Results indicated that wool boards exhibited excellent sound absorption properties, which at high frequencies were better than that at low frequencies. With increasing thickness, the sound absorption coefficients of wool boards increased at low frequencies and fluctuated at high frequencies. However, the sound absorption coefficients changed insignificantly and then improved at high frequencies with increasing density. With increasing cavity depth, the sound absorption coefficients of wool boards increased significantly at low frequencies and decreased slightly at high frequencies.

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Section: Introductionmentioning

confidence: 97%

Effect of Thickness, Density and Cavity Depth on the Sound Absorption Properties of Wool Boards

Qui

Yang

2018

Autex Research Journal

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“…Glass fiber, carbon fiber, basalt fiber, etc [23][24][25] Metal fiber Corrosion and high temperature resistance, stable chemical properties, and high strength.…”

Section: Organic Fiber Materialsmentioning

confidence: 99%

“…Shen and Jiang [24] studied the impact of various process parameters on the acoustic performance of activated carbon fiber felt with regard to the sound absorption performance of carbon fiber. The effects of thickness, bulk density, and fiber diameter on the acoustic performance of seven different types of viscose-based activated carbon fiber felt were analyzed, and their vertical incidence sound absorption coefficients were tested using the transfer function method and the impedance tube method in the frequency range of 250-6300 Hz.…”

Section: Inorganic Fiber Materialsmentioning

confidence: 99%

Research progress of noise reduction of composite structures of porous materials and acoustic metamaterials

Huang,

Yang,

Talukder

et al. 2024

Phys. Scr.

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Noise pollution is an important problem affecting people's lives and work quality. In the current noise reduction materials, the porous sound absorption materials usually only haveagood sound absorption effect for medium and high -frequency sound waves, and the sound absorption effect for low -frequency sound waves is relatively weak. However, in recent years, the research on acoustic metamaterials has made a breakthrough which can effectively absorb or isolate low-frequency sound waves. Therefore, researchers propose to combine porous sound-absorbing materials with acoustic metamaterials to form a composite structure, that broadens the frequency range of noise reduction, so as to achieve the goal of full-frequency domain noise reduction. This paper first introduces the research progress of porous materials and acoustic metamaterials, and then introduces the research progress of composite structures that are made of porous materials and acoustic metamaterials. Finally, the application prospect of the composite field of porous sound-absorbing materials and acoustic metamaterials are summarized.

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“…Chen and Jiang (Chen and Jiang, 2007 ) found that the sound absorption performance of the activated carbon fiber composite is superior to that of other composites. Based on this, Shen and Jiang ( 2016 ), Shen and Jiang ( 2014a , b ) established a sound absorption theory model of activated carbon fiber materials by referring to the circular tube theory model and tested the sound absorption coefficient of the activated carbon fiber sensed in the frequency range of 250–6,300 Hz using a dual-channel impedance tube acoustic analyzer. The result showed that the established sound absorption theory model of activated carbon fiber materials can provide theoretical and technical supports for designing and developing activated-carbon-fiber-based sound absorption materials.…”

Section: Vibration and Noise Reduction Based On The Property Of Soundmentioning

confidence: 99%

Carbon Nanomaterials: A New Sustainable Solution to Reduce the Emerging Environmental Pollution of Turbomachinery Noise and Vibration

Jia

Miu

et al. 2020

Front. Chem.

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The vibration and noise that resulted from turbomachinery, such as fans, compressors, and centrifugal pumps, are known to bring considerable disturbance and pollution to the machine itself, the environment, and the operators. Hence, how to cope with the vibration and noise has become a recent research focus. With the advancement of materials science, more and more new nanomaterials have been applied in the field of noise and vibration reduction. To be specific, carbon-based nanomaterials, such as carbon fibers, carbon nanotubes, and graphenes, have achieved outstanding results. Carbon nanocomposites, such as carbon nanofibers, carbon nanotubes, and graphenes, are characterized by their low densities, high strengths, and high elastic moduli, all of which made carbon nanocomposites the most promising vibration and noise-reduction composites, thanks to their damping properties, compatibilities, noise and vibration absorption qualities, and wide wave-absorbing frequency bands. In light of this, this paper summarizes the progresses and application prospects of such carbon nanocomposites as carbon nanofibers, carbon nanotubes, and graphenes in the field of turbomachinery vibration and noise reduction.

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Effects of different parameters on acoustic properties of activated carbon fiber felts

Cited by 13 publications

References 32 publications

Effect of Thickness, Density and Cavity Depth on the Sound Absorption Properties of Wool Boards

Effect of Thickness, Density and Cavity Depth on the Sound Absorption Properties of Wool Boards

Research progress of noise reduction of composite structures of porous materials and acoustic metamaterials

Carbon Nanomaterials: A New Sustainable Solution to Reduce the Emerging Environmental Pollution of Turbomachinery Noise and Vibration

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