Synergetic coupling large-scale plate-type acoustic metamaterial panel for broadband sound insulation

2019 ◽  
Vol 459 ◽  
pp. 114867 ◽  
Author(s):  
Xiaopeng Wang ◽  
Yongyong Chen ◽  
Guojian Zhou ◽  
Tianning Chen ◽  
Fuyin Ma
Keyword(s):  
Large Scale ◽  
Sound Insulation ◽  
Acoustic Metamaterial ◽  
Broadband Sound ◽  
Plate Type

Step-by-step structural design methods for adjustable low-frequency sound insulation based on infinite plate-type acoustic metamaterial panel

2020 ◽  
Vol 34 (21) ◽  
pp. 2050220
Author(s):  
Ying-Rui Ye ◽  
Xiao-Peng Wang ◽  
Tian-Ning Chen ◽  
Yong-Yong Chen
Keyword(s):  
Structural Design ◽  
Large Scale ◽  
Infinite Plate ◽  
Low Frequency ◽  
Design Methods ◽  
Single Frequency ◽  
Sound Insulation ◽  
Acoustic Metamaterial ◽  
Frequency Sound ◽  
Plate Type

With the development of acoustic metamaterials (AMM), more and more researchers focus on the study of plate-type acoustic metamaterial panel (PAMMP). With the goal of industrial applications, the structural design methods of large-scale PAMMP are important. In this research, we establish an infinite plate-type acoustic metamaterial panel (IPAMMP) model, and experimental and simulation results show that the sound transmission loss (STL) curves of IPAMMP and large-scale PAMMP have good consistency in an interested range. On this basis, a set of step-by-step structural design methods for single-frequency and multi-frequency sound insulation are proposed. By adjusting the structural parameters of IPAMMP, the single-frequency STL peak could be shifted. Further study shows that multiple STL peaks could be realized in the low-frequency range by placing different masses on IPAMMP. Finally, taking transformers 100 Hz, 200 Hz, 300 Hz, 400 Hz and 500 Hz as examples, the feasibility of the structural design methods is verified by simulation. Consequently, the proposed step-by-step structural design methods could address the single-frequency and multi-frequency sound insulation at a specific frequency, demonstrating adjustability.

Multi-mass synergetic coupling perforated bi-layer plate-type acoustic metamaterials for sound insulation

2020 ◽  
Vol 34 (13) ◽  
pp. 2050136
Author(s):  
Weikang Huang ◽  
Tianning Chen ◽  
Quanyuan Jiang ◽  
Xinpei Song ◽  
Wuzhou Yu ◽  
...  
Keyword(s):  
Structural Parameters ◽  
Perforated Plate ◽  
Low Frequency ◽  
Sound Insulation ◽  
Frequency Noise ◽  
Acoustic Metamaterials ◽  
Practical Engineering ◽  
Broadband Sound ◽  
Insulation Performance ◽  
Plate Type

Thin plate-type acoustic metamaterials have the advantages of lightweight, high rigidity and adjustable parameters, showing great practical application values in sound wave control. In this paper, a type of perforated bi-layer plate-type acoustic metamaterials (PBPAM) is designed for low-frequency noise control. The sound insulation peaks can be increased by combining the perforated plate and synergetic masses, making the sound insulation performance close to the mass law at the resonant frequency. Compared to the results predicted by the mass law, a better performance of sound insulation is achieved based on the PBPAM. The effects of the structural parameters are investigated in this study. Based on the impedance tube experiments, the measured results have a good agreement with the simulated ones. This work can provide a reference for low-frequency and broadband sound insulation based on plate-type acoustic metamaterials in practical engineering.

Multilevel plate-type acoustic metamaterials with level-to-level modal antiresonance for sound insulation

2021 ◽  
Author(s):  
Yingrui Ye ◽  
Xiaopeng Wang ◽  
Bo Zhang ◽  
Tianning Chen
Keyword(s):  
Large Scale ◽  
Transmission Loss ◽  
Sound Insulation ◽  
Acoustic Metamaterials ◽  
Aircraft Cabins ◽  
Actual Application ◽  
Out Of Plane ◽  
The Masses ◽  
Application Requirements ◽  
Plate Type

Abstract With the goal of engineering applications, the scalability of the plate-type acoustic metamaterials (PAMs) is significant. However, most of the designed large-scale PAMs are formed by extending a single PAM cell to an array of cells, which will inevitably introduce the vibroacoustic behavior of the entire array structure, resulting in the decay of the sound transmission loss (STL) performance in certain frequency bands. To overcome this weakness, we present a new conceptual design of multilevel PAM to enhance STL performance again by considering level-to-level modal antiresonance. The modal antiresonance of the second-level PAM, which manifests itself as the coupling through out-of-plane vibration of the first- and second-level PAMs, is analyzed to reveal the physical mechanisms. In addition, we also find that the STL profile of the second-level PAM has different dependence on the masses placed on the PAM cell and PAM array. We theoretically design and experimentally demonstrate the sound insulation properties of the proposed second-level PAM. Since the configuration of the multilevel PAM can be easily and flexibly designed in accordance with actual application requirements, it has broad application prospects including but not limiting to submarine shells, aircraft cabins, transformer rooms.

Plate-type metamaterials for extremely broadband low-frequency sound insulation

2018 ◽  
Vol 32 (03) ◽  
pp. 1850019 ◽  
Author(s):  
Xiaopeng Wang ◽  
Xinwei Guo ◽  
Tianning Chen ◽  
Ge Yao
Keyword(s):  
Transmission Loss ◽  
Structural Parameters ◽  
Low Frequency ◽  
Thin Plates ◽  
Sound Insulation ◽  
Frequency Noise ◽  
Low Frequencies ◽  
Acoustic Metamaterial ◽  
Unit Cells ◽  
Plate Type

A novel plate-type acoustic metamaterial with a high sound transmission loss (STL) in the low-frequency range ([Formula: see text]1000 Hz) is designed, theoretically proven and then experimentally verified. The thin plates with large modulus used in this paper mean that we do not need to apply tension to the plates, which is more applicable to practical engineering, the achievement of noise reduction is better and the installation of plates is more user-friendly than that of the membranes. The effects of different structural parameters of the plates on the sound-proofed performance at low-frequencies were also investigated by experiment and finite element method (FEM). The results showed that the STL can be modulated effectively and predictably using vibration theory by changing the structural parameters, such as the radius and thickness of the plate. Furthermore, using unit cells of different geometric sizes which are responsible for different frequency regions, the stacked panels with thickness [Formula: see text]16 mm and weight [Formula: see text]5 kg/m2 showed high STL below 2000 Hz. The acoustic metamaterial proposed in this study could provide a potential application in the low-frequency noise insulation.

scholarly journals A Fano-based acoustic metamaterial for ultra-broadband sound barriers

2021 ◽  
Vol 477 (2248) ◽  
Author(s):  
H. Q. Nguyen ◽  
Q. Wu ◽  
H. Chen ◽  
J. J. Chen ◽  
Y. K. Yu ◽  
...  
Keyword(s):  
Transmission Loss ◽  
Normal Incidence ◽  
Sound Insulation ◽  
Fano Resonances ◽  
Working Mechanism ◽  
Acoustic Metamaterial ◽  
Broadband Absorption ◽  
Sound Barriers ◽  
Sound Reduction ◽  
Broadband Sound

Ultra-broadband sound reduction schemes covering living and working noise spectra are of high scientific and industrial significance. Here, we report, both theoretically and experimentally, on an ultra-broadband acoustic barrier assembled from space-coiling metamaterials (SCMs) supporting two Fano resonances. Moreover, acoustic hyper-damping is introduced by integrating additional thin viscous foam layers in the SCMs for optimizing the sound reduction performance. A simplified model is developed to study sound transmission behaviour of the SCMs under a normal incidence, which sets forth the basis to understand the working mechanism. An acoustic barrier with 220 mm thickness is then manufactured and tested to exhibit ultra-broadband transmission loss overall above 10 dB across the range 0.44–3.85 kHz, covering completely nine third-octave bands. In addition, unconventional broadband absorption in the dampened barrier (65%) is experimentally observed as well. We believe this work paves the way for realizing effective broadband sound insulation, absorption and sound wave controlling devices with efficient ventilation.

Ventilated metamaterials for broadband sound insulation and tunable transmission at low frequency

2021 ◽  
pp. 101348
Author(s):  
Zhenqian Xiao ◽  
Penglin Gao ◽  
Dongwei Wang ◽  
Xiao He ◽  
Linzhi Wu
Keyword(s):  
Low Frequency ◽  
Sound Insulation ◽  
Broadband Sound

Research on the Insulation Performance of Sound-Isolating and Decoupled Tiles

2013 ◽  
Vol 457-458 ◽  
pp. 703-706 ◽  
Author(s):  
De Jin Qian ◽  
Xue Ren Wang ◽  
Xu Hong Miao
Keyword(s):  
Large Scale ◽  
Acoustic Radiation ◽  
Single Point ◽  
Mechanical Vibration ◽  
Sound Insulation ◽  
Acoustic Performance ◽  
Operating Modes ◽  
Insulation Effect ◽  
Vibration And Sound Radiation ◽  
Insulation Performance

The acoustic performance of sound-isolating and decoupled tiles is studied from macroscopic and microscopic. First, the sound absorption and reverse sound insulation performance of sound-isolating and decoupled tiles is studied based on laminated media; then the acoustic decoupling materials influence on acoustic radiation of double cylindrical shell underwater is studied, using a double-layer cylindrical structure of large-scale as experimental model .There are large amount of operating modes designed in this experiment, such as all laying, partial laying, laying and so on. The results show that sound-isolating and decoupled tiles not only have the effect of weakening the absorption of reflections, but also have reverse sound insulation effect, which increases as frequency increases; for single point mechanical vibration, the tiles can effectively inhibit vibration and sound radiation of high frequency in the double shell.

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