Results 41 to 50 of about 252,123 (184)
AIP Advances, 2023 Helmholtz resonator (HR) is widely used in various fields, but the classic HR usually should satisfy the acoustically compact condition, which limits the application range of the classic HR.
Yijun Mao, Mengfan Shi, Chen Xu
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Field quantization for chaotic resonators with overlapping modes [PDF]
, 2001 Feshbach's projector technique is employed to quantize the electromagnetic field in optical resonators with an arbitray number of escape channels. We find spectrally overlapping resonator modes coupled due to the damping and noise inflicted by the ...
C. W. Gardiner +10 more
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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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Tunable Helmholtz Resonators Using Multiple Necks
Micromachines, 2023 One of the uses of Helmholtz resonators is as sound absorbers for room acoustic applications, especially for the low frequency range. Their efficiency is centered around their resonance frequency which mainly depends on elements of their geometry such as
Nikolaos M. Papadakis +1 more
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Nonlocal description of sound propagation through an array of Helmholtz resonators [PDF]
, 2015 A generalized macroscopic nonlocal theory of sound propagation in rigid-framed porous media saturated with a viscothermal fluid has been recently proposed, which takes into account both temporal and spatial dispersion.
Fang, Nicholas X. +3 more
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Tailored acoustic metamaterials. Part I. Thin- and thick-walled Helmholtz resonator arrays
Proceedings of the Royal Society A, 2022 We present a novel multipole formulation for computing the band structures of two-dimensional arrays of cylindrical Helmholtz resonators. This formulation is derived by combining existing multipole methods for arrays of ideal cylinders with the method of
Michael J. A. Smith, I. Abrahams
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Panel of resonators with variable resonance frequency for noise control [PDF]
, 2012 The article focuses on acoustic resonators made of perforated sheets bonded onto honeycomb cavities. This kind of resonators can be used in adverse conditions such as high temperature, dirt and mechanical constraints. For all these reasons, they are, for
Cherrier, Olivier +2 more
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AIP Advances, 2019 We describe an acoustic impedance matching method that permits perfect sound transmission between waveguides of different impedances as set by their cross sectional areas.
William M. Robertson +2 more
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Microwave Kinetic Inductance Detector (MKID) Camera Testing for Submillimeter Astronomy [PDF]
, 2009 Developing kilopixel focal planes for incoherent submm- and mm-wave detectors remains challenging due to either the large hardware overhead or the complexity of multiplexing standard detectors.
A. Vayonakis +18 more
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The theory of the Helmholtz resonator [PDF]
Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 1916 Abstract The ideal form of Helmholtz resonator is a cavernous space, almost enclosed by a thin, immovable wall, in which there is a small perforation establishing a communication between the interior and exterior gas. An approximate theory, based upon the supposition that the perforations is small, and consequently that the wave ...
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