Results 31 to 40 of about 252,123 (184)
Origami-based auxetic tunable Helmholtz resonator for noise control
Smart materials and structures (Print), 2021 In this paper, we propose an origami-based auxetic tunable Helmholtz resonator by controlling the volume of the cavity to allow a real-time tunability of the resonance frequency.
A. Benouhiba +4 more
semanticscholar +1 more source
Modal damping ratios of the two-degree-of-freedom acoustic model having a Helmholtz resonator
Nihon Kikai Gakkai ronbunshu, 2016 Helmholtz resonators are used in many industrial products as devices for reducing low-frequency noise. An advantage of the Helmholtz resonator is that the structure is simple and applicable to low-frequency noise for its size.
Shinichi MARUYAMA +2 more
doaj +1 more source
Nanomaterials, 2021 Harvesting acoustic energy in the environment and converting it into electricity can provide essential ideas for self-powering the widely distributed sensor devices in the age of the Internet of Things.
Haichao Yuan +10 more
semanticscholar +1 more source
Experimental realization of extraordinary acoustic transmission using Helmholtz resonators
AIP Advances, 2015 The phenomenon of extraordinary acoustic transmission through a solid barrier with an embedded Helmholtz resonator (HR) is demonstrated. The Helmholtz resonator consists of an embedded cavity and two necks that protrude, one on each side of the barrier ...
Brian C. Crow +4 more
doaj +1 more source
Leakage Effect on the Transmission Properties of a Duct Loaded with a Helmholtz Resonator
Applied Sciences, 2022 The characteristics of transmitted acoustic field have important significance to the leakage detection and the acoustic metasurface technology. When the additional leak holes are present, the conventional single neck Helmholtz resonator will naturally ...
Yang Ou, Yonghui Zhao
doaj +1 more source
Journal of Low Frequency Noise, Vibration and Active Control, 2021 In this work, modified designs of Helmholtz resonators with extended deflected neck are proposed, numerically evaluated and optimized aiming to achieve a better transmission loss performance over a broader frequency range.
Weiwei Wu, Yiheng Guan
doaj +1 more source
Applied Sciences, 2021 With the rapid increase in automobiles, the importance of reducing low-frequency noise is being emphasized for a comfortable urban environment. Helmholtz resonators are widely used to attenuate low-frequency noise over a narrow range.
Byunghui Kim +6 more
doaj +1 more source
Superfluid Helmholtz Resonators [PDF]
The Journal of the Acoustical Society of America, 1966 The equations governing the resonances of a superfluid in a Helmholtz resonator have been developed. Four cases are considered: (1) when the entire resonator is packed with a superleak; (2) when only the neck is packed with superleak; (3) when only the volume is packed with the superleak; (4) when no superleak is present.
Michael A. Kriss +2 more
openaire +1 more source
Optimal Lower Bound of the Resonance Widths for the Helmholtz Resonator [PDF]
Annales Henri Poincaré, 2015 25 pages, 2 ...
MARTINEZ, ANDRE' GEORGES +1 more
openaire +2 more sources
Using a side-branched volume to tune the acoustic field in a looped-tube travelling-wave thermoacoustic engine with a RC load [PDF]
, 2017 Travelling-wave thermoacoustic engine utilises a compact acoustic network to obtain a right time-phasing between the acoustic velocity and pressure oscillations within the regenerator to force gas parcels to experience a Stirling-like thermodynamic cycle.
Al-Kayiem, Ali, Yu, Zhibin
core +1 more source