Results 21 to 30 of about 13,611 (164)
Crystals, 2022 The design theory for electromagnetic metamaterials with negative refractive indices by using a distributed transmission-line model is introduced to the design of acoustic metamaterials, and a negative refractive index (NRI) acoustic lens is designed ...
Ibuki Takegami +3 more
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Acoustic waveguide based on cascaded Luneburg lens [PDF]
JASA Express Letters, 2022 This paper investigates the acoustic Luneburg Lens (ALL) as a design framework for guiding acoustic wave propagation. In this study, an acoustic waveguide is proposed based on the characteristics of both acoustic wave focusing and collimation of cascaded
Liuxian Zhao, Timothy Horiuchi, Miao Yu
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Transient Analysis of Fresnel Zone Plates for Ultrasound Focusing Applications
Sensors, 2020 Fresnel Zone Plates are planar lenses that can be used to focus ultrasound beams. This kind of acoustic lenses can play a key role in the resolution of ultrasonic NDT systems.
Sergio Pérez-López +4 more
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Binary acoustic metasurfaces for dynamic focusing of transcranial ultrasound
Frontiers in Neuroscience, 2022 Transcranial focused ultrasound (tFUS) is a promising technique for non-invasive and spatially targeted neuromodulation and treatment of brain diseases.
Zhongtao Hu +5 more
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An Acoustic Metamaterial Lens for Acoustic Point-to-Point Communication in Air [PDF]
Acoustical Physics, 2019 Acoustic metamaterials have become a novel and effective way to control sound waves and design acoustic devices. In this study, we design a 3D acoustic metamaterial lens (AML) to achieve point-to-point acoustic communication in air: any acoustic source (i.e. a speaker) in air enclosed by such an AML can produce an acoustic image where the acoustic wave
Sun, Fei +4 more
openaire +2 more sources
Negative refraction imaging of acoustic metamaterial lens in the supersonic range
AIP Advances, 2014 Acoustic metamaterials with negative refraction index is the most promising method to overcome the diffraction limit of acoustic imaging to achieve ultrahigh resolution.
Jianning Han +3 more
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Ultrahigh Frequency Ultrasonic Transducers (150MHz) Based on Silicon Lenses
Micromachines, 2023 Acoustic microscopes and acoustic tweezers have great value in the application of microparticle manipulation, biomedical research and non-destructive testing.
Jun Chen +6 more
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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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Effects of Non-Elevation-Focalized Linear Array Transducer on Ultrasound Plane-Wave Imaging
Sensors, 2016 Plane-wave ultrasound imaging (PWUS) has become an important method of ultrasound imaging in recent years as its frame rate has exceeded 10,000 frames per second, allowing ultrasound to be used for two-dimensional shear wave detection and functional ...
Congzhi Wang +4 more
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Analysis of Predistortion Techniques on Fresnel Zone Plates in Ultrasound Applications
Sensors, 2021 In this work, we analyze the effect of predistortion techniques on the focusing profile of Fresnel Zone Plates (FZPs) in ultrasound applications. This novel predistortion method is based on either increasing or decreasing the width of some of the FZP ...
José Miguel Fuster +3 more
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