Results 41 to 50 of about 9,256 (180)
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. Our empirical and mathematical analysis
Thomas R. Neil +4 more
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AIP Advances, 2019 The photoacoustic signal from single cell plays an important role in medical diagnosis. Currently, the single-cell photoacoustic detection has limitations.
Jianning Han, Peng Yang, Shuai Tang
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Optimization design of the acoustic metamaterial based on the co-simulation method
AIP Advances, 2022 Once the structure of a metamaterial is fixed, it has the property of controlling elastic waves in a fixed frequency range. To obtain a metamaterial with an optimal structure, a co-simulation optimization method is proposed in this paper to optimize the ...
Bingfei Liu, Fuxing Chen
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, 2017 A novel design of an elastic metamaterial with anisotropic mass density is proposed to manipulate flexural waves at a subwavelength scale. The three-dimensional metamaterial is inspired by kirigami, which can be easily manufactured by cutting and folding
Huang, G. L. +3 more
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Wave mitigation in ordered networks of granular chains [PDF]
, 2013 We study the propagation of stress waves through ordered 2D networks of granular chains. The quasi-particle continuum theory employed captures the acoustic pulse splitting, bending, and recombination through the network and is used to derive its ...
Daraio, Chiara +2 more
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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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Time-Frequency Integrals and the Stationary Phase Method in Problems of Waves Propagation from Moving Sources [PDF]
, 2012 The time-frequency integrals and the two-dimensional stationary phase method are applied to study the electromagnetic waves radiated by moving modulated sources in dispersive media. We show that such unified approach leads to explicit expressions for the
Burlak, Gennadiy, Rabinovich, Vladimir
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Zero refractive index in space-time acoustic metamaterials
, 2017 New scientific investigations of artificially structured materials and experiments have exhibit wave manipulation to the extreme. In particular, zero refractive index metamaterials have been on the front line of wave physics research for their unique ...
Fleury, Romain, Koutserimpas, Theodoros
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Study on acoustic performance of new spiral sound absorbing and insulating metamaterial
Journal of Low Frequency Noise, Vibration and Active ControlMiddle and low frequency band sound waves have strong penetration and diffraction abilities during the propagation process, making it difficult to attenuate.
Song Liu +6 more
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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
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