Results 131 to 140 of about 9,355 (217)

Development and Optimization of Broadband Acoustic Metamaterial Absorber Based on Parallel-Connection Square Helmholtz Resonators. [PDF]

Materials (Basel), 2022
Wang E, Yang F, Shen X, Duan H, Zhang X, Yin Q, Peng W, Yang X, Yang L.   +8 more
europepmc   +1 more source

Subwavelength Underwater Imaging of a Wire Array Metamaterial Based on Fabry–Perot Resonance

Archives of Acoustics
Metamaterials with Fabry–P´erot (FP) resonance have proven effective for underwater ultrasound imaging. The propagation phenomenon can be understood as a spatial filter with linear dispersion over a finite bandwidth.
Guo LI, FeiLong LI, LiQing HU, QunFeng LI, GuanJun YIN   +4 more
doaj   +1 more source

Development of Adjustable Parallel Helmholtz Acoustic Metamaterial for Broad Low-Frequency Sound Absorption Band. [PDF]

Materials (Basel), 2022
Yang X, Yang F, Shen X, Wang E, Zhang X, Shen C, Peng W.   +6 more
europepmc   +1 more source

Broadband Sound Insulation and Dual Equivalent Negative Properties of Acoustic Metamaterial with Distributed Piezoelectric Resonators. [PDF]

Materials (Basel), 2022
Zhang Z, Wang J, Li Z, Zhang X.
europepmc   +1 more source

Optimal Design of Acoustic Metamaterial of Multiple Parallel Hexagonal Helmholtz Resonators by Combination of Finite Element Simulation and Cuckoo Search Algorithm. [PDF]

Materials (Basel), 2022
Yang F, Wang E, Shen X, Zhang X, Yin Q, Wang X, Yang X, Shen C, Peng W.   +8 more
europepmc   +1 more source

Integration of Acoustic Metamaterials Made of Plastic to Improve Building Acoustics

Environmental and Climate Technologies
According to the Waste Management Policy of the European Union, the recycling and reuse of various wastes is considered the most environmentally friendly and advanced waste disposal technology that has the least impact on the environment. By applying the
Naimušin Andrej, Januševičius Tomas
doaj   +1 more source

Broadband Vibration Attenuation Achieved by 2D Elasto-Acoustic Metamaterial Plates with Rainbow Stepped Resonators. [PDF]

Materials (Basel), 2021
Wei W, Chronopoulos D, Meng H.
europepmc   +1 more source

Low-frequency acoustic isolation performance of Helmholtz cavity acoustic metamaterials with bilateral single openings

AIP Advances
In this study, we designed a single-opening Helmholtz chamber type acoustic metamaterial with two sides. The complexity of the open channel results in the material having a low frequency of the first sound insulation peak and excellent sound insulation ...
PeiZhou Hu, Jing-Bo Zhao, Hong Liu, XiaoSheng Zhang, Hong Yao, Guang-jun Zhang   +5 more
doaj   +1 more source

Low-frequency sound-absorbing metamaterial based on a series-parallel arrangement structure

Journal of Low Frequency Noise, Vibration and Active Control
Low-frequency noise has a long wavelength, decays very slowly, and is extremely penetrating. Traditional marine acoustic insulation materials have difficulty achieving effective control of this low-frequency noise.
Hongyu Zhuang, Hongyu Cui, Haoming Hu
doaj   +1 more source

Active acoustical metamaterials

, 2014
En accord avec l'équation de propagation des ondes élastiques dans la matière, l'expression de la vitesse du son n'interdit pas à la masse volumique et à la compressibilité effectives du milieu d'être toutes deux négatives. Comment concevoir alors un tel matériau qualifié de métamatériau acoustique ? Qu'elles sont ses principales propriétés ?
openaire   +1 more source