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
Physics, Applied
Xing Li, Haozhe Zhang, Hongxing Tian, Yingzhou Huang, Li Wang
Summary: This study presents a subwavelength acoustic metamaterial based on labyrinthine structures that has tunable sound insulation and ventilation properties, potentially applicable in acoustic air vents, soundproofing windows, and duct noise control.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
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
Mechanics
Tianyue Yuan, Xiang Song, Jingjian Xu, Baorui Pan, Dan Sui, Heye Xiao, Jie Zhou
Summary: This study designs a tunable acoustic composite metasurface with significant advantages in sound absorption performance. The phase gradient adjustment and resonance dissipation contribute to its excellent sound absorption ability. The modified microperforated panel system and the coiling-up space cavity enable the metasurface to achieve excellent sound absorption in both low and high frequency ranges.
COMPOSITE STRUCTURES
(2022)
Article
Acoustics
Jin He, Qingxuan Liang, Peiyao Lv, Yutao Wu, Tianning Chen
Summary: This study proposes a tunable acoustic metasurface that can regulate the phase of sound waves by adjusting the relative angle of resonant rings. The metasurface exhibits versatile functions such as acoustic wave direction control, acoustic illusion, and acoustic focusing. Experimental results demonstrate its effectiveness across multiple frequencies.
Article
Polymer Science
Heyuan Huang, Ertai Cao, Meiying Zhao, Sagr Alamri, Bing Li
Summary: The study introduces the design concept of bionic configuration philosophy into membrane-type acoustic metamaterials to achieve wide sound-attenuation bands in the low frequency range. Two bio-inspired designs show significant sound attenuation with lightweight performance in comparison to traditional MAM configurations.
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
Optics
JinLong Feng, XiePeng Chen, Lin-Sheng Wu, Jun-Fa Mao
Summary: A broadband tunable reflective graphene-based linear polarization converter (GLPC) integrated with a periodic double split ring resonator (DSRR) in the millimeter-wave regime is proposed in this study. The tuning characteristic of the GLPC is analyzed using full-wave simulations and the equivalent circuit model method (ECM). The GLPC prototype's co- and cross-polarized reflection coefficients were measured, and the reflectivity can be controlled by changing the bias voltage. The designed GLPC shows potential applications in radar cross-section reduction, antenna design, and stealth technology.
Article
Engineering, Mechanical
Jingwen Guo, Xin Zhang, Yi Fang, Renhao Qu
Summary: This study introduces an ultra-thin sound-absorbing metasurface for low-frequency sound absorption, which demonstrates excellent absorption properties at 180 Hz and achieves multi-frequency band absorption through multiple resonances, making it a promising option for realistic low-frequency sound attenuation applications.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Physics, Multidisciplinary
Tong Cai, Shuang Huang, Hui Guo, Pei Sun, Tao Yuan
Summary: In this paper, the sound insulation performance of membrane-type acoustic metamaterial with eccentric mass block (MAMEM) is improved by introducing an elastic layer. The study shows that the peak sound insulation frequency of the MAMEM structure can be obtained by introducing the elastic layer in the mass block of MAMEM. The thickness of the elastic and metal layers has an influence on the sound insulation performance of the MAMECM, and under the same mass, the peak frequency of sound insulation can be shifted to the left by reducing the thickness of the metal layer. The experimental results verify the accuracy of the findings.
Article
Optics
Ximin Tian, Junwei Xu, Kun Xu, Yanhong Qian, Xiaolong Ma, Peng Yang, Xiangyang Duan, Pei Ding, Zhi-Yuan Li
Summary: By integrating phase-change material Ge2Sb2Te5 and reflective metasurface, a unique carpet cloak has been achieved, providing broadband invisibility, wide angular coverage, continuous tunability, and switchable cloaking features.
Article
Engineering, Electrical & Electronic
Heng Yang, Shi Cong Wang, Peng Li, Yuan He, Yun Jing Zhang
Summary: In this study, a reflective polarization conversion metasurface (PCM) with symmetrical L-shaped patches is proposed, enabling switch between linear-to-linear (LTL) cross-polarization and linear-to-circular (LTC) polarization modes using PIN diodes. The PCM demonstrates ultrawide bandwidth for both LTL and LTC polarization conversion through multimode activation. A microstrip line-based dc biasing network composed of radial stubs is introduced to isolate RF currents, overcoming issues caused by RF-lumped choke inductors in the ultrawide bandwidth. A prototype with 15 x 15 units is fabricated and shows successful LTC and LTL polarization conversion within specific frequency ranges.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Acoustics
Min Li, Jiuhui Wu, Bobo Wu, Fuyin Ma, Chongrui Liu, Xiaoyang Yuan, Yangbin Sun
Summary: This paper reveals a near-zero suppression mechanism of aerodynamic acoustic pressure using the ultra-thin low-frequency broadband lotus-pods-neck Helmholtz resonator (LPNHR) metasurface. The LPNHR design increases the bandwidth by changing the single neck of a Helmholtz resonator (HR) to a lotus-pods multi-layer-hole neck. The LPNHR generates stronger multi-vortexes inside its neck, resulting in decreased impedance and suppressing the shift of sound attenuation to higher frequencies. The experimental results show a significant reduction in sound pressure level on the Ahmed body surface using the LPNHR metasurface.
Article
Physics, Applied
Shuyu Zuo, Chengxin Cai, Xiaojun Li, Ye Tian, Erjun Liang
Summary: This article introduces an acoustic compact analog computing system based on acoustic metasurfaces. The proposed system utilizes a nondispersive focusing metasurface and a reconfigurable reflective metasurface to perform broadband and tunable mathematical operations. Numerical results show that the system can achieve spatial differentiation and integration in the frequency range of the incident acoustic wave, highlighting its potential applications.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
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
Physics, Applied
Yanbin He, Tianning Chen, Xinpei Song
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2020)
Article
Physics, Applied
Chen Chen, Tianning Chen, Ailing Song, Xinpei Song, Jian Zhu
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2020)
Article
Physics, Multidisciplinary
Xinpei Song, Tianning Chen, Jian Zhu, Wei Ding, Qingxuan Liang, Xiaopeng Wang
Article
Physics, Multidisciplinary
Chen Chen, Tianning Chen, Wei Ding, Junzhe Zhang, Weikang Huang, Jian Zhu
Article
Materials Science, Multidisciplinary
Jian Zhu, Changshi Lao, Tianning Chen, Jensen Li
MATERIALS & DESIGN
(2020)
Article
Physics, Multidisciplinary
Wei Ding, Tianning Chen, Yanbin He, Chen Chen, Weikang Huang, Zaixiu Jiang, Zhenkun Ding, Bo Wang, Wuzhou Yu, Jian Zhu
Article
Physics, Multidisciplinary
Xinpei Song, Tianning Chen, Weikang Huang, Chen Chen
Summary: Researchers have proposed a simple method to design a 2-bit coding acoustic metasurface by combining Helmholtz resonator-like structures, allowing for independent modulation of wave fronts at different frequencies. They theoretically and numerically analyzed the equivalent circuit principle and decoupling effect to clarify the underlying physical mechanism of their design. By controlling the number of outgoing diffraction modes, they successfully filter and suppress redundant diffraction beams to achieve perfect negative reflection.
Article
Physics, Applied
Xin-Pei Song, Tian-Ning Chen, Chen Chen, Wei Ding
Summary: This study demonstrates frequency band-switchable topologically protected edge state transport based on an acoustic topological insulator, showing acoustic topological phase transition. Experimental measurements and simulations show good agreement, paving the way for designing intelligent and programmable acoustic devices.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Physics, Applied
Xinpei Song, Tianning Chen, Rui Li
Summary: The study introduces an acoustic system for frequency band-selected one-way topological edge state transmission by combining a double-layer sonic crystal and a lossy acoustic metasurface, enabling the operating band of the system to shift between two distinct ranges.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Engineering, Mechanical
Chen Chen, Tianning Chen, Wei Ding, Fuyi Yang, Jian Zhu, Jie Yao
Summary: This article investigates and demonstrates the capability of impurities to control and switch valley Hall edge modes in acoustic systems. The acoustic transmission spectrum is found to be sensitive to the rotation angle of the impurity, providing a potential platform for switchable acoustic devices or filters.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Acoustics
Wei Ding, Tianning Chen, Chen Chen, Dimitrios Chronopoulos, Jian Zhu
Summary: This work presents the design, manufacture, and experimental testing of a three-dimensional twisted phononic crystal made of a single-phase material. The research comprehensively explains the mechanism of bandgap formation in the crystal and the methods for tuning the bandgap.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Chemistry, Multidisciplinary
Junzhe Zhang, Tianning Chen, Bo Zhang, Jian Zhu
Summary: This study constructs a semi-empirical model to predict the sound absorption performance of composite structures consisting of open-cell foam and perforated plates. The optimized composite structure can lower the peak sound absorption frequency while broadening the sound absorption frequency band by using a genetic algorithm.
APPLIED SCIENCES-BASEL
(2023)
Article
Physics, Multidisciplinary
Wei Ding, Tianning Chen, Chen Chen, Dimitrios Chronopoulos, Badreddine Assouar, Yongzheng Wen, Jian Zhu
Summary: This study introduces an analogy with Thomson scattering in electromagnetic waves to characterize the bandgap phenomena in chiral phononic crystals (PnCs) with translation-rotation coupling. The coupling motion in chiral unit cells is found to be similar to the result of Thomson scattering, resulting in the formation of bandgaps.
NEW JOURNAL OF PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Chen Chen, Tianning Chen, Wei Ding, Xinhai Xiang, Feiran Mao, Jian Zhu
Summary: This article presents a method based on split-ring resonator coupling to realize topological insulators and construct second-order topological insulators. By adjusting the coupling strength, the hopping and frequencies of the topological corner states can be easily tuned, providing a more flexible approach for tunable acoustic topological insulators.