Acoustic Slow-Wave Effect Metamaterial Muffler for Noise Control of HVDC Converter Station

Yang, Dingge; Jiang, Quanyuan; Wu, Jingfeng; Han, Yanhua; Ding, Bin; Niu, Bo; Xie, Guolin

doi:10.3389/fmats.2021.804302

Cited by 8 publications

(3 citation statements)

References 16 publications

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“…Among the presently developed sound absorbing materials and structures, the acoustic metamaterial is the most promising candidate to be widely applied in reducing the noise generated from working equipment in the factory, because the noise is mainly in the low–frequency range [ 7 , 8 , 9 , 10 ]. Hedayati and Lakshmanan [ 7 ] had proposed the pneumatically–actuated acoustic metamaterials based on Helmholtz resonator, which could achieve the acoustic bandgap shifted from a frequency band of 150–350 Hz to that of 300–600 Hz.…”

Section: Introductionmentioning

confidence: 99%

“…Hedayati and Lakshmanan [ 7 ] had proposed the pneumatically–actuated acoustic metamaterials based on Helmholtz resonator, which could achieve the acoustic bandgap shifted from a frequency band of 150–350 Hz to that of 300–600 Hz. An acoustic slow–wave effect metamaterial muffler for noise control of the HVDC (high voltage direct current) converter station, developed by Yang et al [ 8 ], could obtain a broadband quasi–perfect absorption of noise from 600 to 900 Hz. Zhang et al [ 9 ] developed the light–weight large–scale tunable metamaterial panel for the low–frequency sound insulation, and the multiple local resonance caused sound transmission loss improvements over the traditional mass law.…”

Section: Introductionmentioning

confidence: 99%

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Development and Optimization of Broadband Acoustic Metamaterial Absorber Based on Parallel–Connection Square Helmholtz Resonators

et al. 2022

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An acoustic metamaterial absorber of parallel–connection square Helmholtz resonators is proposed in this study, and its sound absorption coefficients are optimized to reduce the noise for the given conditions in the factory. A two–dimensional equivalent simulation model is built to obtain the initial value of parameters and a three–dimensional finite element model is constructed to simulate the sound absorption performance of the metamaterial cell, which aims to improve the research efficiency. The optimal parameters of metamaterial cells are obtained through the particle swarm optimization algorithm, and its effectiveness and accuracy are validated through preparing the experimental sample using 3D printing and measuring the sound absorption coefficient by the standing wave tube detection. The consistency between the experimental data and simulation data verifies feasibility of the proposed optimization method and usefulness of the developed acoustic metamaterial absorber, and the desired sound absorption performances for given conditions are achieved. The experimental results prove that parallel–connection square Helmholtz resonators can achieve an adjustable frequency spectrum for the low frequency noise control by parameter optimization, which is propitious to promote its application in reducing the noise in the factory.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development and Optimization of Broadband Acoustic Metamaterial Absorber Based on Parallel–Connection Square Helmholtz Resonators

et al. 2022

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“…However, in the design of the locally-resonant AMS, TL valleys between adjacent peaks are inevitable due to the weak coupling among the compact reactive resonators, which may significantly impairs the overall TL performance [38,45,47]. A fruitful way to improve the coupling among the resonators is to introduce dissipation into the resonators, such as adding the porous material or considering the thermal viscosity caused by narrow ducts [36,37,48,49]. Although this way can raise the valleys between the resonance peaks, the TL peaks are simultaneously drastically suppressed.…”

Section: Introductionmentioning

confidence: 99%

Compact broadband acoustic meta-silencer based on synergy between reactive and resistive units

Zhang¹,

Yu²,

Xiao³

et al. 2022

J. Phys. D: Appl. Phys.

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Acoustic silencers are the most effective solution to control noise in ducts. In this paper, we propose a compact acoustic meta-silencer (AMS) based on the synergy between reactive and resistive units that enables the reduction of low-frequency and broadband noise. We first propose a conceptual AMS comprising simple reactive and resistive units to verify its unique sound attenuation performance. To explore its potential for application, we then propose an advanced AMS unit consisting of two independent annular chambers that represent reactive and resistive units, respectively. The synergistic mechanism between reactive and resistive units to achieve superior sound attenuation is revealed. Next, the band structures of the infinite periodic advanced AMS are discussed, and three different types of advanced AMS containing six units are examined. It is demonstrated numerically and experimentally that the optimized AMS with a compact size can achieve a transmission loss (TL) higher than 15 dB over a super-wide low-frequency range (290 Hz–1344 Hz). The work here provides a new avenue for the design of low-frequency and broadband meta-silencers to control the noise in ducts.

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Low-frequency acoustic attenuator based on a labyrinthine Helmholtz resonator

Beck,

Almeida,

Mikulski

et al. 2024

J Braz. Soc. Mech. Sci. Eng.

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Acoustic Slow-Wave Effect Metamaterial Muffler for Noise Control of HVDC Converter Station

Cited by 8 publications

References 16 publications

Development and Optimization of Broadband Acoustic Metamaterial Absorber Based on Parallel–Connection Square Helmholtz Resonators

Development and Optimization of Broadband Acoustic Metamaterial Absorber Based on Parallel–Connection Square Helmholtz Resonators

Compact broadband acoustic meta-silencer based on synergy between reactive and resistive units

Low-frequency acoustic attenuator based on a labyrinthine Helmholtz resonator

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