Multilayer structures for high-intensity sound energy absorption in low-frequency range

Zhu, Junzhe; Gao, Hao; Dai, Shoubo; Qu, Yegao; Meng, Guang

doi:10.1016/j.ijmecsci.2023.108197

Cited by 18 publications

(3 citation statements)

References 76 publications

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“…Для достижения этой цели необходимо контролировать формирование макро-, микро-и наноструктуры cтроительных материалов [11,12,13,14,15]. Важной особенностью звукопоглощающих материалов являются открытые поры, в которых звуковая энергия преобразуется в тепловую [16,17,18,19,20]. Однако материалы с открытой пористостью имеют высокую степень насыщения водой, что может негативно сказываться на эксплуатационных характеристиках их морозостойкости и долговечности.…”

Section: раздел IIIunclassified

Sound-absorbing aerated concrete based on China fly ash

Xiao

2023

Vestn. SibADI

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Introduction. The development of aerated concrete with a high content of open pores, using polymineral binders with reduced cement content and significant utilization of local technogenic resources (in particular, enriched waste from thermal power plants) is relevant for the modern construction industry. To systematize modern methods for studying the characteristics of sound insulation and sound protection of buildings, it is necessary to take into account the diversity of international building codes. The aim of the work is to develop a scientifically based technological solution that provides effective aerated concrete based on fly ash from China with improved sound-absorbing characteristics.Main part. In this paper, a methodological basis, which provides for the comprehensive use of fundamental approaches in building materials science, was used. Integrated design to develop composite materials of a given quality at the nano-, micro- and macrolevels was used. The physical and mechanical properties of raw materials and the required characteristics of the developed materials using physicochemical methods of analysis, including laser granulometry, X-ray phase analysis, scanning electron microscopy, thermal methods, etc were studied. The experimental studies in the laboratories of V.G. Shukhov BSTU, as well as Chinese universities were carried out.Conclusions. In this work, scientific approaches for the design and synthesis of aerated concrete with improved acoustic characteristics in various regions of the country, taking into account local raw materials were formulated. Further research can be aimed at expanding the range of lightweight materials for building envelopes in order to ensure a safe human environment. This can be achieved by synthesizing multicomponent composite binders that affect the formation of nano-, micro- and macrostructures of materials.

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Section: раздел IIIunclassified

Sound-absorbing aerated concrete based on China fly ash

Xiao

2023

Vestn. SibADI

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“…In recent years, acoustic metamaterials with excellent low‐frequency sound absorption performance have provided new possibilities for solving such problems, and have rapidly developed into membrane‐type structure, resonance cavity‐like structure, slit‐type structure, and coiled‐up space structure. [ 1–6 ] In addition, research on traditional porous materials combined with acoustic metamaterials to improve their sound absorption performance is also extensively emerging. [ 7–11 ]…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, acoustic metamaterials with excellent low-frequency sound absorption performance have provided new possibilities for solving such problems, and have rapidly developed into membrane-type structure, resonance cavity-like structure, slit-type structure, and coiled-up space structure. [1][2][3][4][5][6] In addition, research on traditional porous materials combined with acoustic metamaterials to improve their sound absorption performance is also extensively emerging. [7][8][9][10][11] As a kind of acoustic metamaterial that can absorb low-frequency sound efficiently and reduce the thickness of structure significantly, the coiled-up space structure has been paid increasing attention.…”

Section: Introductionmentioning

confidence: 99%

Simulated and Experimental Research on Highly Efficient Sound Absorption of Low‐Frequency Broadband Acoustic Metamaterial Based on Coiled‐Up Space

Liang,

Wu,

Chen

et al. 2023

Adv Eng Mater

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Acoustic metamaterials are broadly employed in the vibration and noise reduction fields for large defense industrial equipment such as engines and compressors thanks to their excellent subwavelength characteristics and extraordinary acoustic performance. However, the low‐frequency broadband sound absorption remains a thorny challenge in the scientific and engineering communities. This paper focuses on the low‐frequency broadband acoustic metamaterial composed of eight spiral absorbers coupled in two rows, researching its thermoviscous dissipation and sound absorption mechanism, and further analyzing its sound absorption characteristics. In the frequency range of 510‐990 Hz, the average sound absorption coefficient of acoustic metamaterial with sound absorption area ratio of 2.72% reaches 0.80, and the cross‐sectional height is only 34 mm, which achieves the tradeoffs between structural thickness, frequency bandwidth and sound absorption performance. Furthermore, continuous and highly efficient broadband sound absorption within the target frequency band in practical applications can be achieved by optimizing adjustable parameters. In addition, the finite element simulations are verified by experiments, which presents good agreement. Compared with traditional sound absorbing structure, the low‐frequency broadband acoustic metamaterial proposed in this paper owns the characteristics of small size and easy processing, which has broad application prospects in the field of low‐frequency noise control engineering.This article is protected by copyright. All rights reserved.

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Progress on the Sound Absorption of Viscoelastic Damping Porous Polymer Composites

Tang

2024

Macromol. Rapid Commun.

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Porous polymer composites (PPC) have developed rapidly recently, which are widely used in various industrial fields. Viscoelastic damping is an important behavior of porous polymer composites, and it can determine the sound absorption for noise reduction applications. This review has mainly covered the viscoelastic damping and sound absorption of porous polymer composites. Different fabrication approaches of porous polymer composites are gathered. The mechanism of viscoelastic damping behavior is described, and also the sound absorption properties. Followed by the introduction of enhanced sound absorption of viscoelastic damping porous polymer composites, including the incorporation of fillers, microstructures modification, combination with nanofibrous materials, and multilayer configuration, etc. The incorporated fillers can effectively adjust the interfacial area in composites, and obtain desired bonding conditions. Microstructures modification is an effective tool to improve the morphologies of both polymer matrix and fillers, which can be achieved by chemical treatment and surface coating. The combination with lightweight nanofibrous layer can increase the low frequency absorption. The configuration of multilayer composites can improve both acoustical and mechanical properties for engineering applications. It is hoped that this comprehensive review is benefit for the promising development of porous polymer composites in related fields.

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Multilayer structures for high-intensity sound energy absorption in low-frequency range

Cited by 18 publications

References 76 publications

Sound-absorbing aerated concrete based on China fly ash

Sound-absorbing aerated concrete based on China fly ash

Simulated and Experimental Research on Highly Efficient Sound Absorption of Low‐Frequency Broadband Acoustic Metamaterial Based on Coiled‐Up Space

Progress on the Sound Absorption of Viscoelastic Damping Porous Polymer Composites

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