Results 31 to 40 of about 3,581 (229)
Acoustic metamaterial for subwavelength edge detection. [PDF]
Nat Commun, 2015 Metamaterials have demonstrated the possibility to produce super-resolved images by restoring propagative and evanescent waves. However, for efficient information transfer, for example, in compressed sensing, it is often desirable to visualize only the
Molerón M, Daraio C.
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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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Acoustics, 2022 Significant potential for acoustic metamaterials to provide a breakthrough in sound attenuation has been unlocked in recent times due to advancements in additive manufacturing techniques.
Daniel Deery +4 more
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Physics Today, 2016 By incorporating novel subwavelength structures into macroscopic materials, acousticians can create devices with exotic sound-altering properties.
Michael R. Haberman, Matthew D. Guild
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Moth wings are acoustic metamaterials [PDF]
Proceedings of the National Academy of Sciences, 2020 Significance Bats and moths are embroiled in an evolutionary arms race. Using ultrasonic biosonar, bats detect their insect prey, which in turn deploy diverse strategies to avoid predation. Here, we show that some moth species evolved wings covered with a canopy of scales that reduces ultrasonic echoes.
Thomas R. Neil +4 more
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Low-frequency sound absorption performance of composite acoustic metamaterials with rotational labyrinth channels and micro-perforated panels [PDF]
AIP AdvancesIn this paper, a kind of novel acoustic metamaterial combined with a rotational labyrinth and a micro-perforated plate is designed. The design of the rotational labyrinth structure combined with micro-perforated plates endows the acoustic metamaterial ...
Xinxin Liu +4 more
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Retrieving effective acoustic impedance and refractive index for size mismatch samples
AIP Advances, 2022 In this paper, we have presented an analytical solution to extract the effective properties of acoustic metamaterials from the measured complex transmission and reflection coefficients when the metamaterial and impedance tube have different sizes.
Mohammad Javad Khodaei +3 more
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An Approach for Active Acoustic Metamaterial Design Implementation and Analysis [PDF]
, 2022 Acoustic metamaterials are artificially structured materials exhibiting extraordinary acoustical properties unavailable in natural media. Currently, most of the acoustic metamaterials developed are passive.
Zhai, Yuxin
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A study on acoustic metamaterial to control reflection sound
Nihon Kikai Gakkai ronbunshu, 2017 Acoustic metamaterial can have arbitrary acoustic characteristics , and there is possibility to improve acoustic performance of any products dramatically. As metamaterial, many kind of types have been propounded and studied.
Yukihide NAGAYO +2 more
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Metamaterials for simultaneous acoustic and elastic bandgaps
Scientific Reports, 2021 In this work, we present a single low-profile metamaterial that provides bandgaps of acoustic and elastic waves at the same time. This was done by ensuring impedance mismatch in two different domains, the fluid domain where the acoustic waves propagate ...
Waiel Elmadih +2 more
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