Results 21 to 30 of about 1,130 (256)
Micromachines, 2020 A soundwave is transmitted by adjacent molecules in the medium, and depending on the type of sound, it exhibits various characteristics such as frequency, sound pressure, etc. If the acoustic wavelength of the soundwave is sufficiently long compared with
Sung Ho Lee +4 more
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Elastic Helmholtz resonators [PDF]
The Journal of the Acoustical Society of America, 1992 The influence of wall elasticity on the response of a Helmholtz resonator is examined by analyzing the canonical case of a thin elastic spherical shell with a circular aperture subject to plane-wave excitation. By neglecting the thickness of the wall and representing the elasticity via a thin shell theory the problem is reduced to one of solving an ...
A. N. Norris, G. Wickham
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Mechanical Engineering Journal, 2021 This paper describes the optimum tuning of damped Helmholtz silencers. In this study, Helmholtz resonators are used as silencers that suppress acoustic resonance in host acoustic fields. Side branch silencers and Helmholtz silencers are commonly known as
Keisuke YAMADA +4 more
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Noise reduction efficiency of Helmholtz resonator in simulated channel of HVAC system
International Journal of Environmental Health Engineering, 2014 Aims: The purpose of this article was investigating the efficiency of designing resonator in decreasing low noises. Materials and Methods: The designed Helmholtz resonator was installed in a channel analogous to ventilation channel.
Hossein Ali Yousefi Rizi +2 more
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Low-Frequency-Noise Attenuation through Extended-Neck Double-Degree-of-Freedom Helmholtz Resonators
Acoustics, 2023 The use of acoustic liners, based on double-degree-of-freedom Helmholtz resonators, for low-frequency-noise attenuation is limited by the volume of individual resonating cavities.
Abhishek Gautam +2 more
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MATEC Web of Conferences, 2018 In this work the physical and mathematical models of predicting the effective acoustic properties of sound absorbing structures (Helmholtz resonators) in joint operation were formulated.
Pisarev Pavel, Anoshkin Aleksandr
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Applied Sciences, 2019 Helmholtz resonators, traditionally designed as a narrow neck backed by a cavity, are widely applied to attenuate combustion instabilities in gas turbine engines.
Jianguo Wang +3 more
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Optimal Lower Bound of the Resonance Widths for the Helmholtz Resonator [PDF]
Annales Henri Poincaré, 2015 25 pages, 2 ...
MARTINEZ, ANDRE' GEORGES +1 more
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Increasing the Insertion Loss of Sonic Crystal Noise Barriers with Helmholtz Resonators
Applied Sciences, 2023 Helmholtz resonators (HRs) have the advantage of extending and improving their insulating capacity when used as scatterers in noise barriers made of periodic media, such as sonic crystals (SCs).
Javier Redondo +2 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 designed within the context of linear vibration.
Maher O. Al-Turk +2 more
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