Article
Engineering, Mechanical
Jun-Young Jang, Choon-Su Park, Kyungjun Song
Summary: According to the mass law, dense and thick materials are typically used for blocking low-frequency sound waves. However, this study introduces the use of lightweight and thin metamaterials for effective soundproofing. The proposed soundproofing consists of a thin membrane combined with an ultralight membrane-type acoustic metamaterial. Through vibration in the membrane, the soundproofing can be easily tuned to achieve broadband sound insulation. The results of numerical and experimental tests demonstrate the excellent sound-blocking characteristics of this soundproofing material, making it suitable for applications in noise insulation, such as acoustic enclosures, automobile insulation, walls, and engine rooms.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Physics, Applied
Santosh Dasila, Chitti Venkata Krishnamurthy, V. Subramanian
Summary: A miniaturized, broadband absorber with high absorption rate (> 95%) has been proposed and constructed, using quarter-wavelength resonator tubes as rectangular meta-atoms. The study presents the basic theoretical aspects, numerical simulations, fabrication process, and experimental validation of the absorber. The use of simple, fabrication-friendly meta-atoms allows for greater spatial coverage by tiling over large surfaces.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Physics, Applied
Le Liu, Long-Xiang Xie, Weichun Huang, Xiu Juan Zhang, Ming-Hui Lu, Yan-Feng Chen
Summary: Sound absorption is crucial for room acoustics and noise control. Acoustic metamaterials, especially those based on deep learning, show promise in achieving broadband sound absorption. This letter presents a deep learning-based acoustic metamaterial approach that achieves ultra-broadband sound absorption without visible oscillation. Results from numerical simulations and experiments demonstrate the effectiveness and versatility of this approach.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Zi-xiang Xu, Hai-yang Meng, An Chen, Jing Yang, Bin Liang, Jian-chun Cheng
Summary: A tunable low-frequency acoustic absorber composed of multi-layered ring-shaped microslit tubes with subwavelength thickness is proposed and experimentally verified, achieving high-efficient acoustic absorption and superior impedance manipulation capability. The proposed metastructure allows continuous tunability over a wide working frequency band and shows potential for practical engineering applications such as noise control.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Shubhi Bansal, Sriram Subramanian
Summary: While acoustic metamaterials face challenges with limited tunability and narrow operational frequency range, integrating liquids with active actuation mechanisms in metamaterials opens up new design possibilities. The use of active microfluidic techniques enables active tunability in liquid-embedded metamaterial designs, leading to the development of a novel class of microfluidic acoustic metamaterials (MAM) with deep-subwavelength ultra-compact tunable features and multi-stable characteristics. MAM demonstrates active acoustic switching, amplitude modulation, and phase modulation with high transmission efficiency and broadband operations, paving the way for automation, tuning, and miniaturization of metamaterials using microelectromechanical (MEMS) and microfluidic concepts.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Mechanics
Xiaonan Yuan, Qinhong Li, Xiao Xiang, Jiawei Jiao, Yingzhou Huang, Xiaoxiao Wu
Summary: This study achieved an ultra-broadband absorber with outstanding thermal convection performance in a fluid environment, which can reduce noise and support heat transfer simultaneously.
Article
Physics, Applied
Ao Chen, Zhiwei Yang, Xiaoguang Zhao, Stephan Anderson, Xin Zhang
Summary: We propose a composite acoustic metamaterial consisting of Mie resonators and a Helmholtz resonator array, which achieves a broadband acoustic attenuation in the low-frequency regime. The wideband soundproofing effect is explained using the transfer-matrix method and the lumped-element model, and the transmission loss and transmittance are tested numerically and experimentally. By using a deep-subwavelength structure, our composite design successfully blocks over 90% of incident acoustic energy within a frequency range of 1250 Hz, offering a design paradigm for extraordinary airborne acoustic silencing in low-frequency regimes.
PHYSICAL REVIEW APPLIED
(2023)
Article
Engineering, Mechanical
Guilin Wen, Sidong Zhang, Hongxin Wang, Zhen-Pei Wang, Junfeng He, Zijie Chen, Jie Liu, Yi Min Xie
Summary: Noise reduction is crucial in engineering applications. A novel origami-based acoustic metamaterial (OBAM) with tunable and broad bandwidth sound-eliminating capacities is developed in this study. The OBAM's sound attenuation properties are extensively investigated through theoretical, numerical, and experimental methods, showing good consistency. The OBAM demonstrates powerful and broadband low-frequency sound elimination capacity at sub-wavelength.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Multidisciplinary
Tinggui Chen, Junrui Jiao, Dejie Yu
Summary: The study proposes a method based on the gradient acoustic-grating metamaterial (GAGM) for detecting harmonic and periodic impulse signals more easily. Numerical and experimental investigations demonstrate that GAGM achieves acoustic rainbow trapping to spatially separate different frequency components. This work opens up new vistas for weak signals detection in various areas.
Article
Engineering, Mechanical
Hua-Yang Chen, Zhen-Hui Qin, Sheng-Nan Liang, Xin Li, Si-Yuan Yu, Yan-Feng Chen
Summary: A gradient-index seismic metamaterial based on a surface acoustic PnC is proposed to provide omnidirectional protection against ultra-broadband seismic Rayleigh waves.
EXTREME MECHANICS LETTERS
(2023)
Article
Physics, Applied
Yingjian Sun, Xujin Yuan, Zhongkun Jin, Guangfu Hong, Mingji Chen, Mengjing Zhou, Weiduan Li, Daining Fang
Summary: This study reports a method to broaden the frequency band of underwater sound absorption structure (USAS) by embedding a membrane-type resonator, forming a membrane-type underwater acoustic absorption metamaterial. The mechanism of the membrane-type metamaterial is explained through theory and validated through simulation and experiment. The experimental results show significant improvement in sound absorption coefficient in the specified frequency range, indicating the potential application in acoustic wave communication and device compatibility design technologies.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Multidisciplinary Sciences
H. Q. Nguyen, Q. Wu, H. Chen, J. J. Chen, Y. K. Yu, S. Tracy, G. L. Huang
Summary: An ultra-broadband acoustic barrier assembled from space-coiling metamaterials supporting two Fano resonances is reported, with additional thin viscous foam layers for acoustic hyper-damping. Experimental results show over 10 dB reduction in noise transmission loss across a specific range, along with unconventional broadband absorption observed in the dampened barrier.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2021)
Article
Multidisciplinary Sciences
Xindong Zhou, Xiaochen Wang, Fengxian Xin
Summary: In this research, an ultrathin acoustic metamaterial composed of space-coiled water channels with a rubber coating is proposed for underwater sound absorption. The proposed metamaterial achieves perfect sound absorption at 181 Hz with a deep subwavelength thickness. The introduction of a rubber coating leads to slow-sound propagation, which is crucial for achieving perfect low-frequency sound absorption.Parametric studies are conducted to investigate the effects of specific structural and material parameters on sound absorption. By tailoring key geometric parameters, an ultra-broadband underwater sound absorber is constructed, paving a new way for designing underwater acoustic metamaterials and controlling underwater acoustic waves.
SCIENTIFIC REPORTS
(2023)
Article
Physics, Multidisciplinary
Xu Qiang-Rong, Shen Cheng, Han Feng, Lu Tian-Jian
Summary: A novel local resonant acoustic metamaterial plate with quasi-zero stiffness is proposed for effective broadband insulation of sound at low frequencies. Numerical simulations and experimental measurements demonstrate that the metastructure exhibits great insulation performance around the local resonance frequency, achieving a transmission loss of 30 dB around 10 Hz. The physical mechanism behind its superior insulation performance is explored through analysis of equivalent mass density, reflection coefficient, and acoustic impedance ratio.
ACTA PHYSICA SINICA
(2021)
Article
Physics, Applied
Zhendong Li, Zhonggang Wang, Zichao Guo, Xinxin Wang, Xifeng Liang
Summary: The study developed a hierarchical acoustic metamaterial with ultra-broadband sound absorption capabilities at high temperatures. The material utilizes a hierarchical design to achieve excellent absorption performance in both low- and mid-frequency ranges, demonstrating unprecedented capabilities in acoustic absorption.
APPLIED PHYSICS LETTERS
(2021)
Article
Acoustics
Xiao Liang, Jiu Hui Wu, Guojian Zhou
Article
Acoustics
Xiaopeng Wang, Yongyong Chen, Guojian Zhou, Tianning Chen, Fuyin Ma
JOURNAL OF SOUND AND VIBRATION
(2019)
Article
Acoustics
Guojian Zhou, Jiu Hui Wu, Kuan Lu, Xiujie Tian, Wei Huang, Keda Zhu
Article
Acoustics
Kuan Lu, Guojian Zhou, Nansha Gao, Lizhou Li, Hongxia Lei, Mingrang Yu
Article
Physics, Applied
Guojian Zhou, Xiao Liang, Yan Liu, Jiaming Chu, Haofeng Liang, Jiuhui Wu
Summary: This paper investigates the effects of acoustic streaming and mechanisms of sound transmission in a metallic micro-cavity acoustic black hole (ABH) structure. The study examines the sound field flow characteristics inside the micro-cavity ABH under sound excitation and characterizes the sound transmission mechanisms using obtained acoustic streaming effects. The numerical results show that the increase in velocity and acceleration at the ABH tip position is the main reason for sound energy focusing, while the dramatic increase in the tip cross-section reduces the acoustic streaming velocity, resulting in sound energy attenuation. The thermoviscous effect of the acoustic boundary layer also dissipates low-frequency sound energy. The proposed micro-cavity ABH structure demonstrates sound transmission loss in the low-frequency regime, making it suitable for applications in the construction industry.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
