Results 61 to 70 of about 9,574 (206)

Study on acoustic performance of new spiral sound absorbing and insulating metamaterial

Journal of Low Frequency Noise, Vibration and Active Control
Middle and low frequency band sound waves have strong penetration and diffraction abilities during the propagation process, making it difficult to attenuate.
Song Liu, Pan-pan Liu, Ren-jie Zhao, Jian-hua Lu, Kang Yang, Huayu Zhou, Yi-fan Du   +6 more
doaj   +1 more source

Inherently Disordered Auxetic Metamaterials

Advanced Science, EarlyView.
Inherently disordered auxetic metamaterials based on random chiral Delaunay triangulations are designed and investigated using numerical simulations and experimental tests. These disordered frameworks exhibit orthotropic behavior and a large negative Poisson's ratio (ca.
Matteo Montanari, Reza Moghimimonfared, Andrea Spaggiari, Luke Mizzi   +3 more
wiley   +1 more source

Acoustic focusing effect of composite metamaterial column in air

Journal of Measurement Science and Instrumentation, 2017
The acoustic focusing effect of metamaterial has a wide range of applications in medicine,acoustic imaging,signal detection,etc.This paper presents an acoustic metamaterial applied to the acoustic focusing effect.The formation of acoustic metamaterial is
HAN Jian-ning, ZHEN Wen-xiang, QIN Jia-jie, WU Yu-peng, TANG Shuai, Key Laboratory of Instrumental Science & Dynamic Measurement   +5 more
doaj  

Miniaturized Spiral Metamaterial Array for a Ventilated Broadband Acoustic Absorber

Shock and Vibration, 2020
The high-efficiency and broadband acoustic reduction performance in a miniaturized free-flow structure remains challenging in acoustic engineering applications due to the contradiction of ventilation and acoustic reduction performance.
Xingxing Liu, Xiang Li, Zhiying Ren
doaj   +1 more source

Transient Terahertz Oscillations During Photoinduced Polarization Topology Reconfiguration in Ferroelectric Superlattices

Advanced Science, EarlyView.
Terahertz resonances in crystalline heterostructures could close a spectral gap between conventional electronics and photonics while opening new windows on non‐equilibrium lattice dynamics. Femtosecond optical screening of the depolarization field in epitaxial PbTiO3/SrTiO3 superlattices launches a collective polar mode that oscillates near 1 THz and ...
Deepankar Sri Gyan, Hyeon Jun Lee, Xiangwei Guo, Youngjun Ahn, Samuel D. Marks, Mohammed H. Yusuf, Matthew Dawber, James M. Glownia, Diling Zhu, Takahiro Sato, Sanghoon Song, Haidan Wen, Jia‐Mian Hu, Paul G. Evans   +13 more
wiley   +1 more source

All‐in‐One Underwater Quality Evaluation Metamaterial With Mechanical Robustness, Sound Attenuation, and Diffuse Reflection

Advanced Science, EarlyView.
In this work, a bioinspired all‐in‐one underwater quality evaluation metamaterial, combining sound attenuation, diffuse reflection, and mechanical robustness, is proposed based on jumping spider locomotion and human skeletal biomechanics. Meanwhile, a CNN‑driven quality evaluation framework is established for theoretically dimension‐reduced ...
Hongze Li, Zhenyu Li, Jinshui Yang, Jianhao Wu, Yidan Chen, Linzhi Wu, Hong Hu, Penglin Gao, Yegao Qu   +8 more
wiley   +1 more source

Acoustic Properties of a Metamaterial Acoustic Barrier

, 2020
In the last years, a lot of papers have reported the results of researchers on metamaterials. The study of metamaterials represents a new research field in noise control. Metamaterials are artificial structures with periodical elements, made by the arrangement of scatterers in a square or triangular lattice configuration.
Iannace, Gino, Berardi, Umberto, Ciaburro, Giuseppe, Trematerra, Amelia   +3 more
openaire   +1 more source

Multiscale Architecture and Mechanics of the Cell Nucleus: Implications for Disease, Bioengineering and Nanomedicine

Advanced Science, EarlyView.
Nuclear mechanical properties are inherently scale‐dependent, arising from a hierarchical architecture that spans DNA, chromatin, the nuclear envelope, and condensates. Experimental techniques and theoretical models are integrated into a cohesive multiscale framework linking nanoscale structural features to organelle‐level mechanical behavior.
Xinran Liu, Xin Chen, Qingyang Zhao, Weikang Tan, Lingrui Zhu, Kin Liao, Vincent Chan, Nicolae Goga, Winfred O. Larkotey, Yang Li, Yinghui Shi, Wenya Shu, Lin Wang, Weiqing Wang, Tian Jian Lu, Yulong Han   +15 more
wiley   +1 more source

Acoustic multipolar local effects of metamaterial with annular columnar structures

Journal of Measurement Science and Instrumentation, 2017
Research of the acoustic local effect of metamaterial is widely used in the fields of environmental science,military industry and biomedicine.In this paper,the metamaterial is designed by annular columnar structures.The acoustic local effect in slender ...
HAN Jian-ning, ZHEN Wen-xiang, QIN Jia-jie, WU Yu-peng, TANG Shuai, Key Laboratory of Instrumentation Science and Dynamic Measurement   +5 more
doaj  

Review of Underwater Acoustic Communication Based on Metamaterials

水下无人系统学报
In recent years, acoustic metamaterials, as a sort of novel artificial composite materials, have demonstrated the ability to surpass the limitations of traditional materials through their exceptional acoustic parameter manipulation capabilities.
Ping ZHOU, Han JIA, Jun YANG
doaj   +1 more source