Acoustic Focusing with Intensity Modulation Based on Sub-Wavelength Waveguide Array
Crystals, 2021 Acoustic focusing with intensity modulation plays an important role in biomedical and life sciences. In this work, we propose a new approach for simultaneous phase and amplitude manipulation in sub-wavelength coupled resonant units, which has not been ...
Mingran Zhang, Guangrui Gu
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Evaluating the applicability of a screen diffraction approximation to local volcano infrasound
Volcanica, 2021 Atmospheric acoustic waves from volcanoes at infrasonic frequencies (0.01–20 Hz) can be used to estimate source parameters for hazard modeling, but signals are often distorted by wavefield interactions with topography, even at local recording distances (
Sean Maher +4 more
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Numerical study of acoustic focusing using a bianisotropic acoustic lens [PDF]
The Journal of the Acoustical Society of America, 2020 Materials with sub-wavelength asymmetry and long-range order have recently been shown to demonstrate acoustical properties analogous to electromagnetic bianisotropy. One characteristic of bianisotropic acoustic media is the existence of direction-dependent acoustic impedance. Therefore, the magnitude and phase of the acoustic fields transmitted through
A J, Lawrence +3 more
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Acoustic wavefront manipulation via transmission-type labyrinth structure
Frontiers in Physics, 2022 In this work, a transmission-type labyrinth structure (LS) is proposed to construct subwavelength acoustic functional metasurfaces, through which various desirable acoustic wavefront manipulation can be achieved in a broadband from 2,700 Hz to 3,900 Hz ...
Rui Wang, Fengbao Yang
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On the Design of Soret Zone Plates Based on Binary Sequences Using Directional Transducers
Sensors, 2021 In this work, we analyze the effect of the distribution of transparent Fresnel regions over the focusing profile of Soret Zone Plates (SZP) based on binary sequences. It is shown that this effect becomes very significant in those fields where directional
Pilar Candelas +2 more
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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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Acoustical hooks: A new subwavelength self-bending beam
Results in Physics, 2020 In this work, we report the first experimental observation of a new type of near-field curved acoustic beam confirmed by simulations. This new curved acoustical beam is generated by asymmetric distribution of the vortices in a polymer Janus particle ...
Constanza Rubio +4 more
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The Potential of Focusing Acoustic Retroreflectors for Architectural Surface Treatment
Applied Sciences, 2023 How much sound can a building surface reflect to a source, the location of which is not exactly known? This paper considers this question particularly for a planar surface acting as an array of retroreflectors, or of focusing retroreflectors.
Densil Cabrera +3 more
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Design of Acoustic Bifocal Lenses Using a Fourier-Based Algorithm
Sensors, 2021 In this work, we develop a new design method based on fast Fourier transform (FFT) for implementing zone plates (ZPs) with bifocal focusing profiles. We show that the FFT of the governing binary sequence provides a discrete sequence of the same length ...
José Miguel Fuster +2 more
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Acoustic excitation on flame properties caused by two sound sources [PDF]
, 2020 Research and development in understanding the responses of acoustic excitation as a meant to influence flame behavior have become one of the significant issues in combustion instability.
Samsubaha, Muhammad Fauzi
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