Results 51 to 60 of about 13,426 (215)
Recent progress in acoustic metamaterials and active piezoelectric acoustic metamaterials - A review
Applied Materials Today, 2022 Abstract Acoustic metamaterials, structured to produce anomalous reflection and refraction indices that are not found in conventional materials, are gaining prominence in engineering applications. These artificial structures have enabled novel functionalities, such as negative effective properties, extraordinary wave manipulation, enhanced sound ...
Ji, G, Huber, J
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Advanced Functional Materials, EarlyView.Cuttlebone‐inspired metamaterials exploit a septum‐wall architecture to achieve excellent mechanical and functional properties. This review classifies existing designs into direct biomimetic, honeycomb‐type, and strut‐type architectures, summarizes governing design principles, and presents a decoupled design framework for interpreting multiphysical ...
Xinwei Li, Zhendong Li
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Materials & DesignAiming to address the vibration and noise reduction requirements of large-scale transportation, the latest research advancements in acoustic metamaterials are classified and reviewed based on practical engineering challenges in this paper.
Dan Yao +7 more
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Highly-anisotropic elements for acoustic pentamode applications
, 2012 Pentamode metamaterials are a class of acoustic metafluids that are characterized by a divergence free modified stress tensor. Such materials have an unconventional anisotropic stiffness and isotropic mass density, which allow themselves to mimic other ...
Calvo, David C. +4 more
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Intelligent Acousto‐Electrical Metamaterials (IAM) for Sound Source Detection
Advanced Materials, EarlyView.Our proposed metamaterial concept enables sound source detection using a single material, in contrast to conventional arrays that require dozens or even hundreds of transducers. We show that the coupled acoustic–vibrational–electrical responses in piezoelectric metamaterials give rise to topology‐governed charge transport, producing distinct voltage ...
Victor Couëdel +7 more
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Acoustic transmission loss in Hilbert fractal metamaterials
Scientific Reports, 2023 Acoustic metamaterials are increasingly being considered as a viable technology for sound insulation. Fractal patterns constitute a potentially groundbreaking architecture for acoustic metamaterials.
Gianni Comandini +3 more
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Two-Dimensional Composite Acoustic Metamaterials of Rectangular Unit Cell from Pentamode to Band Gap
Crystals, 2021 Pentamode metamaterials have been receiving an increasing amount of interest due to their water-like properties. In this paper, a two-dimensional composite pentamode metamaterial of rectangular unit cell is proposed. The unit cells can be classified into
Qi Li, Ke Wu, Mingquan Zhang
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Topological mechanics of gyroscopic metamaterials
, 2015 Topological mechanical metamaterials are artificial structures whose unusual properties are protected very much like their electronic and optical counterparts.
Irvine, William T. M. +5 more
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Tunable acoustic double negativity metamaterial [PDF]
Scientific Reports, 2012 Man-made composite materials called "metamaterials" allow for the creation of unusual wave propagation behavior. Acoustic and elastic metamaterials in particular, can pave the way for the full control of sound in realizing cloaks of invisibility, perfect lenses and much more.
Liang, Zixian +3 more
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Advanced Materials, EarlyView.A flexible and lightweight acoustic metamaterial composed of air cavities encased in polydimethylsiloxane (PDMS) is introduced to enhance ultrasound power transfer. The metamaterial leverages the strong reflectivity of air cavity boundaries to concentrate incoming ultrasound, thereby improving the performance of piezoelectric energy harvesters ...
Hyung‐Suk Kwon +4 more
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