Broadband low-frequency sound absorbing metastructures composed of impedance matching coiled-up cavity and porous materials

Ren, Shu-Wei; Liu, Yiyang; Sun, Wei; Wang, Hao; Ye, Lei; Wang, Haitao; Zeng, Xiangyang

doi:10.1016/j.apacoust.2022.109061

Cited by 14 publications

(3 citation statements)

References 32 publications

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“…Acoustic waves are reflected perfectly by the channel walls due to the significant impedance mismatch between the channel material and fluid medium (Ren et al 2022 ). By adjusting the width or depth of the channel to match multiples of the acoustic wavelength, an acoustic resonator is created, allowing for the formation of a standing acoustic wave field using two pairs of interdigital transducers (IDTs) in SAW-based devices (Mazalan et al 2021 ).…”

Section: Theory and Mechanism Of Acoustofluidic Separationmentioning

confidence: 99%

A review of acoustofluidic separation of bioparticles

Hossein,

Angeli

2023

Biophys Rev

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Acoustofluidics is an emerging interdisciplinary research field that involves the integration of acoustics and microfluidics to address challenges in various scientific areas. This technology has proven to be a powerful tool for separating biological targets from complex fluids due to its label-free, biocompatible, and contact-free nature. Considering a careful designing process and tuning the acoustic field particles can be separated with high yield. Recently the advancement of acoustofluidics led to the development of point-of-care devices for separations of micro particles which address many of the limitations of conventional separation tools. This review article discusses the working principles and different approaches of acoustofluidic separation and provides a synopsis of its traditional and emerging applications, including the theory and mechanism of acoustofluidic separation, blood component separation, cell washing, fluorescence-activated cell sorting, circulating tumor cell isolation, and exosome isolation. The technology offers great potential for solving clinical problems and advancing scientific research.

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Section: Theory and Mechanism Of Acoustofluidic Separationmentioning

confidence: 99%

A review of acoustofluidic separation of bioparticles

Hossein,

Angeli

2023

Biophys Rev

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“…This paper describes the theoretical basis, analytical models and rigorous numerical and experimental validation of such extremely tortuous modular acoustic composite materials involving labyrinthine channels within both non-porous and microporous matrices. Note that this design is fundamentally different from acoustic composite with internal labyrinthine structures formed by thin, impermeable, rigid walls embedded in a porous matrix, usually made of conventional acoustic foams or wools [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Extremely tortuous sound absorbers with labyrinthine channels in non-porous and microporous solid skeletons

Zieliński,

Opiela,

Dauchez

et al. 2024

Applied Acoustics

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“…However, their thickness is not acceptable for low-frequency noise reduction because the wavelength of the sound-absorbing band is proportional to its thickness [8]. Therefore, broadband sound-absorbing materials with low frequency characteristics have become the focus of the noise control field in the past ten years [2,3,[9][10][11][12][13][14][15][16][17]. Based on acoustic metamaterials, the sound absorption meta-structure with sub-wavelength characteristics is developed to effectively make up for the low frequency sound absorption defects of traditional sound absorption materials [18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

A mechanically adjustable acoustic metamaterial for low- frequency sound absorption with load-bearing and fire resistance

Wang,

Hu,

Mao

et al. 2023

Phys. Scr.

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Broadband sound absorption is limited to discrete noise with abrupt peaks in the spectrum. Here, we proposed a mechanically adjustable acoustical metamaterials (AAMM) for low-frequency sound absorption with deep-subwavelength (0.025), which integrates Helmholtz resonators and Fabry-Perot (FP) tubes by precise modular design. The calculation results based on the theoretical model demonstrate that the broad low frequency (from 100 Hz to 500 Hz) tunability of the composite adjustable sound absorbing materials. The adjustable design scheme is further verified by numerical simulation. Then a multi-impedance adjustment method is proposed to improve the local optimal defect and make it have quasi-perfect sound absorption effect in the range of 120Hz-348Hz. The sound absorbing material sample can withstand 2.7 tons of dynamic load and 1300° high temperature, presenting superior compression and fire resistance compared to conventional porous sound absorbing materials and membrane acoustic metamaterials. This research on assembled machine-adjustable sound absorption material enriches the conventional acoustic metamaterial design scheme, further improves the space utilization rate, and provides an effective solution for dealing with low-frequency complex variable noise.

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Broadband low-frequency sound absorbing metastructures composed of impedance matching coiled-up cavity and porous materials

Cited by 14 publications

References 32 publications

A review of acoustofluidic separation of bioparticles

A review of acoustofluidic separation of bioparticles

Extremely tortuous sound absorbers with labyrinthine channels in non-porous and microporous solid skeletons

A mechanically adjustable acoustic metamaterial for low- frequency sound absorption with load-bearing and fire resistance

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