Results 1 to 10 of about 252,123 (184)
Design, Manufacturing, and Acoustical Analysis of a Helmholtz Resonator-Based Metamaterial Plate
Acoustics, 2021 Acoustic metamaterials are materials artificially engineered to control sound waves, which is not possible with conventional materials. We have proposed a design of an acoustic metamaterial plate with inbuilt Helmholtz resonators.
Sourabh Dogra, Arpan Gupta
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Sensors, 2022 In this study, a piezoelectric micromachined ultrasonic transducer (PMUT) is integrated with a microliter-sized volume-tunable Helmholtz resonator. The passive Helmholtz resonator is constructed using an SU8 photolithography-defined square opening plate ...
Guo-Hua Feng, Wen-Sheng Chen
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Frontiers in Materials, 2022 Acoustic energy, especially broadband low-frequency sound energy is part of the environmental mechanical energy acquisition cannot be ignored. Herein, a multi-tube parallel Helmholtz resonator-based triboelectric nanogenerator (MH-TENG) is investigated ...
Qiqi Zhang +6 more
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A bottle of tea as a universal Helmholtz resonator [PDF]
The Physics Teacher, 2018 Resonance is an ubiquitous phenomenon present in many systems. In particular, air resonance in cavities was studied by Hermann von Helmholtz in the 1850s. Originally used as acoustic filters, Helmholtz resonators are rigid-wall cavities which reverberate
Cabeza, Cecilia +3 more
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Evaluation of the Oscillation Velocity in the Neck of the Helmholtz Resonator in Nonlinear Regimes
Acoustics, 2022 Methods for measuring the acoustic characteristics of orifices have been reviewed. Comparison of three methods for evaluating of oscillation velocity in the neck of the Helmholtz resonator are presented.
Alexandr Komkin +2 more
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Applied Sciences, 2023 A 600-km/h maglev train can effectively close the speed gap between civil aviation and rail-based trains, thereby alleviating the conflict between the existing demand and actual capacity.
Dian-Qian Li +4 more
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Sensors, 2019 In this paper, an indirect method of measuring an analyte concentration in a test solution using the resonant frequency change of a Helmholtz resonator is proposed, using a novel architecture of Helmholtz resonator filled with two kinds of fluids (fixed ...
Yugang Chen, Yong-Hwa Park
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FEM Investigation of a Multi-Neck Helmholtz Resonator
Applied Sciences, 2023 An increasingly significant area of research with several applications in numerous disciplines is that of multi-neck Helmholtz resonators. This research is set to explore the accuracy and applicability of the finite element method (FEM) for the ...
Nikolaos M. Papadakis +1 more
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Low frequency acoustic energy harvester based on a planar Helmholtz resonator
AIP Advances, 2018 A novel acoustic energy harvester (AEH) based on an acoustic Helmholtz resonator is proposed in this research to harvest low frequency acoustic energy.
Ming Yuan +3 more
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Characterization of a Dual Nonlinear Helmholtz Resonator
Micromachines, 2022 Resonant elements can generate small amounts of energy that make them pertinent for feeding miniaturized accelerometers with the energy needed. Suitable oscillator candidates are Helmholtz resonators, which have been, for a long time, analyzed and ...
Maher O. Al-Turk +2 more
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