Results 21 to 30 of about 35,365 (254)
Research on the Processing Method of Acoustic Focusing Cavities Based on the Temperature Gradient
Applied Sciences, 2021 Aiming at the key factors affecting the quality and efficiency of high-energy in-beam machining, this paper studies the broadband acoustic focusing effect based on a discrete temperature gradient.
Liqun Wu +6 more
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Helmholtz-Structured Two-Dimensional Super-Diffraction Meta-Lens
Frontiers in Physics, 2022 Focusing beyond the acoustic diffraction limit has always been expected, especially in acoustic imaging and ultrasonic therapy. Manipulating the acoustic waves beyond the diffraction limit offers an alternative application potential in high-resolution ...
He-He Li +8 more
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Research Progress and Development Trends of Acoustic Metamaterials
Molecules, 2021 Acoustic metamaterials are materials with artificially designed structures, which have characteristics that surpass the behavior of natural materials, such as negative refraction, anomalous Doppler effect, plane focusing, etc.
Hao Song +3 more
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Continuous-phase-transformation acoustic metasurface
Results in Physics, 2021 Acoustic metasurfaces are artificial structures, one of whose functions is to achieve plane wave focusing due to the phase gradient transformation of specific structural units. However, previous periodic acoustic metasurfaces for plane wave focusing have
Junfeng Chen, Jianlan Xie, Jianjun Liu
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M-Bonacci Zone Plates for Ultrasound Focusing
Sensors, 2019 In this work, we present a thorough analysis on M-bonacci zone plates for ultrasound focusing applications. These planar lenses are capable of providing bifocal focusing profiles with equal intensity in both foci and become very appealing for a wide ...
Sergio Pérez-López +2 more
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Calculation for Acoustic Radiation Force from Rectangular Weakly Focusing Transducer Using the Ray Acoustic Model [PDF]
Archives of Acoustics, 2022 Based on the ray acoustic model, a new relationship between the radiation force and the acoustic power is studied for a rectangular weakly focusing transducer. The effect of pressure reflection coefficient on this model is discussed.
Lili Yu +3 more
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Results in Optics, 2021 Experimental and simulation investigations on laser-induced acoustic wave propagation and the optical refraction effects by varying the focusing lens distance from the water-surface have been presented.
Xiaosong Shi +3 more
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Linearly focused acoustic beams for acoustic microscopy
Electronics Letters, 1981 A linearly focused acoustic beam is investigated to be introduced into acoustic microscopy for characterising materials in the nonscanning version. The new acoustic beam enables us to detect acoustic anisotropies of materials to be measured successfully.
J. Kushibiki, A. Ohkubo, N. Chubachi
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Menger fractal structure with negative refraction and sound tunnelling properties
Materials Research Express, 2019 We construct new quasi-three-dimensional fractal acoustic metamaterials based on adoption of the Menger structure, which offers extraordinary parameters such as double-negative properties and a near-zero density.
Yu Liu +6 more
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Sensors, 2023 In the article, the study of the quality of tomogram focusing during the inspection of objects with curved surfaces by flexible acoustic array was described.
Dmitry A. Sednev +4 more
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