A generalized model for space-coiling resonators

Wang, Xiaonan; Zhou, Yude; Sang, Jinqiu; Zhu, W. D.

doi:10.1016/j.apacoust.2019.107045

Cited by 23 publications

(8 citation statements)

References 17 publications

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“…As can be seen, over the entire frequency range of 100-5000 Hz, the trends and magnitudes of the experiment and simulation results are corresponding and particularly well compared in the frequency range of 630-1000 Hz. This firstly suggests that the simulation model is feasible for the current numerical experiments and the reported simulation results are supposed to be convinced [19,32,33,[35][36][37]. It is noted that the highest value of ∆LA eq is occurred at 1000 Hz both in experiment and simulation, followed by 800 Hz.…”

Section: Experimental Results and Comparisonmentioning

confidence: 68%

“…As shown in Figure 3, the geometry of the 2D numerical model is corresponding to the experimental setup that is installed in a semi-anechoic chamber (4.0 m (L) × 3.6 m (W) × 2.4 m (H)). The radiation boundary condition which has been successfully employed by other researchers [11,34,35] was applied for the boundaries of semi-anechoic chamber walls, indicating no reflection on these boundaries. For the rest of the walls, the sound hard boundary conditions were applied [11,34].…”

Section: Methodsmentioning

confidence: 99%

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Parametric Optimization of Local Resonant Sonic Crystals Window on Noise Attenuation by Using Taguchi Method and ANOVA Analysis

et al. 2022

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Local resonant sonic crystals (LRSCs) window as a novel design has recently been proposed to achieve a good balance between noise mitigation, natural ventilation and natural lighting. In an effort to explore the feasibilities of such designs in civil residential buildings, an optimization methodology was proposed to develop a more compact LRSCs window with high noise attenuation performance in the present study. Specifically, the Taguchi method was adopted for the design of experiments on the parameters of interest and their corresponding levels, and SN ratio analysis was then applied for the parametric evaluations on the noise attenuation on specified frequencies in traffic noise (concentrated sound energy frequency range: 630–1000 Hz). Three optimal sets of design parameters on the interested frequencies, namely, 630 Hz, 800 Hz and 1000 Hz were obtained. ANOVA analysis was conducted to quantificationally identify the design parameters with statistical significance and remarkable contribution to the desired performance. Results indicate that the slit size has the most significant influence on the overall noise attenuation performance, followed by cavity width. An optimal set of design parameters to achieve the overall best noise reduction performance in the frequency range of 630–1000 Hz was finally determined by combining the SN ratio and ANOVA analysis. A prototype of the final optimized LRSCs window was then fabricated and tested in a semi-anechoic chamber. Good agreement was found between the experiment and numerical simulation. In comparison to the benchmark case, the final optimized design can achieve a further noise reduction by 2.84 dBA, 3.48 dBA and 5.56 dBA for the frequencies of 630 Hz, 800 Hz and 1000 Hz, respectively. The overall noise reduction for the interested frequency range can be promoted by 3.28 dBA. The results indicate that the proposed optimization methodology is practical and efficient in designing a high-performance LRSCs window or improving similar applications.

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Section: Experimental Results and Comparisonmentioning

confidence: 68%

Section: Methodsmentioning

confidence: 99%

Parametric Optimization of Local Resonant Sonic Crystals Window on Noise Attenuation by Using Taguchi Method and ANOVA Analysis

et al. 2022

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“…Different designs can offer multiple propagation paths, directions and scattering. Wang et al [11] has proposed an equivalent model for SFC which applies HR and quarter wavelength tube theory to a ranging transfer matrix that defines the SFC peak frequency. The transfer matrix establishes a relationship between the acoustic pressure and volume velocities in 2 defined regions.…”

Section: Space Filling Curvesmentioning

confidence: 99%

A Review of Acoustic Space Filling Curve Metamaterials for Jet Engine Inlets

O'Boy¹,

Glover²

2020

Acoustics 2020

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“…In this way, they achieved a negative bulk modulus value near the bandgap. Other new AMMs that have emerged include perforated plate-type AMMs, 7,23 space-coiling-type AMMs, 12,13,15,16,[24][25][26] and membrane-and-plate-type AMMs. 18 One of the first studies on membrane-type AMMs is by Yang et al, 27 who proposed manipulating the sound waves in the low-frequency range between 50 and 1,000 Hz by ensuring negative mass density in the bandgap.…”

Section: Introductionmentioning

confidence: 99%

Biomimetic Metamaterial Design Simulation and Evaluation for Building Acoustics by Impedance Measurements

Yazıcı

Gül

2021

Journal of Testing and Evaluation

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This study investigates the potentials of acoustic metamaterial (AMM) applications in room and building acoustics by means of impedance tube experiments. With their extreme properties in either sound absorption or transmission loss, AMMs can perform better than traditional acoustic materials in buildings. Importantly, they are also more sustainable and hygienic than fibrous and porous materials. Depending on the matrix material used, AMMs can vary in transparency and color. Considering both their acoustic and aesthetic values, this study develops different types of metamaterial for possible uses as a partition wall, a surface layer, or a design element.The proposed metamaterials are primarily based on the exploration of ratios and forms from nature-the golden ratio, web-labyrinthine structures, genetic and neural systems such as deoxyribonucleic acid (DNA) molecules, and the synapse structures in the brain-reproduced on a subwavelength scale. These abstractions are then combined with the 3-D space coiling and 3-D labyrinth approaches of AMM design. Modules of the proposed AMMs are manufactured in a 3-D printer and tested in an impedance tube to estimate their normal incidence sound absorption coefficients and transmission loss characteristics. Based on the results obtained, the modules with the higher performances are used in the design of partition walls of varying heights. Two real-case architecture studios are simulated with and without the proposed AMM interventions over field test-tuned acoustical models of the studios to assess the effectiveness of such an approach in a possible acoustical design problem.

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A generalized model for space-coiling resonators

Cited by 23 publications

References 17 publications

Parametric Optimization of Local Resonant Sonic Crystals Window on Noise Attenuation by Using Taguchi Method and ANOVA Analysis

Parametric Optimization of Local Resonant Sonic Crystals Window on Noise Attenuation by Using Taguchi Method and ANOVA Analysis

A Review of Acoustic Space Filling Curve Metamaterials for Jet Engine Inlets

Biomimetic Metamaterial Design Simulation and Evaluation for Building Acoustics by Impedance Measurements

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