Transcranial Acoustic Metamaterial Parameters Inverse Designed by Neural Networks [PDF]
BME Frontiers, 2023 Objective: The objective of this work is to investigate the mapping relationship between transcranial ultrasound image quality and transcranial acoustic metamaterial parameters using inverse design methods.
Yuming Yang +6 more
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Double-negative acoustic metamaterial [PDF]
Physical Review E, 2004 We show here the existence of acoustic metamaterial, in which both the effective density and bulk modulus are simultaneously negative, in the true and strict sense of an effective medium. Our double-negative acoustic system is an acoustic analogue of Veselago's medium in electromagnetism, and shares many unique consequences, such as negative refractive
Li, Jensen Tsan Hang, Chan, Che Ting
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Conformally Mapped Multifunctional Acoustic Metamaterial Lens for Spectral Sound Guiding and Talbot Effect [PDF]
Research, 2019 We demonstrate a conformally mapped multifunctional acoustic metamaterial Mikaelian lens. Mikaelian lens is a gradient medium with a hyperbolic secant refractive index profile that can realize functions like beam self-focusing.
He Gao +6 more
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Time-domain imaging of gigahertz surface waves on an acoustic metamaterial [PDF]
New Journal of Physics, 2018 We extend time-domain imaging in acoustic metamaterials to gigahertz frequencies. Using a sample consisting of a regular array of ∼1 μ m diameter silica microspheres forming a two-dimensional triangular lattice on a substrate, we implement an ultrafast ...
Paul H Otsuka +9 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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An in vitro demonstration of a passive, acoustic metamaterial as a temperature sensor with mK resolution for implantable applications [PDF]
Microsystems & NanoengineeringWireless medical sensors typically utilize electromagnetic coupling or ultrasound for energy transfer and sensor interrogation. Energy transfer and management is a complex aspect that often limits the applicability of implantable sensor systems.
Lucrezia Maini +5 more
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Sound reduction by metamaterial-based acoustic enclosure
AIP Advances, 2014 In many practical systems, acoustic radiation control on noise sources contained within a finite volume by an acoustic enclosure is of great importance, but difficult to be accomplished at low frequencies due to the enhanced acoustic-structure ...
Shanshan Yao +3 more
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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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Mesh sensitivity and experimental verification for randomized arbitrary geometry cavity-based acoustic metamaterials designed with 2D FEM simulations [PDF]
Scientific ReportsAcoustic metamaterial development is a rapidly expanding field, which has shown great success in many applied scenarios. The development of acoustic metamaterials is enabled by modelling techniques such as the Finite Elements Method (FEM), which allow ...
Piotr Książek, Bartłomiej Chojnacki
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Low and medium frequency acoustic absorption properties of acoustic metamaterials with irregular cylindrical cavities [PDF]
Scientific ReportsThe automotive industry is moving towards low noise and lightweight, and acoustic metamaterials can play a vital role. This paper presents a new acoustic metamaterial consisting of cylindrical holes of different depths arranged circumferentially and ...
Zhenhua Hou +5 more
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