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.

scholarly journals A lightweight low-frequency sound insulation membrane-type acoustic metamaterial

AIP Advances ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 025116 ◽  
Author(s):  
Kuan Lu ◽  
Jiu Hui Wu ◽  
Dong Guan ◽  
Nansha Gao ◽  
Li Jing
Keyword(s):  
Low Frequency ◽  
Sound Insulation ◽  
Acoustic Metamaterial ◽  
Frequency Sound ◽  
Membrane Type

Low frequency sound insulation performance of asymmetric coupled-membrane acoustic metamaterials

2019 ◽  
Vol 15 (5) ◽  
pp. 1006-1015
Author(s):  
Mengna Cai ◽  
Hongyan Tian ◽  
Haitao Liu ◽  
Yanhui Qie
Keyword(s):  
Low Frequency ◽  
Sound Insulation ◽  
Asymmetric Structure ◽  
Insulation Material ◽  
Metamaterial Structure ◽  
Content Type ◽  
Acoustic Metamaterial ◽  
Frequency Sound ◽  
Membrane Type ◽  
Insulation Performance

Purpose With the development of the modern technology and aerospace industry, the noise pollution is remarkably affecting people’s daily life and has been become a serious issue. Therefore, it is the most important task to develop efficient sound attenuation barriers, especially for the low-frequency audible range. However, low-frequency sound attenuation is usually difficult to achieve for the constraints of the conventional mass-density law of sound transmission. The traditional acoustic materials are reasonably effective at high frequency range. This paper aims to discuss this issue. Design/methodology/approach Membrane-type local resonant acoustic metamaterial is an ideal low-frequency sound insulation material for its structure is simple and lightweight. In this paper, the finite element method is used to study the low-frequency sound insulation performances of the coupled-membrane type acoustic metamaterial (CMAM). It consists of two identical tensioned circular membranes with fixed boundary. The upper membrane is decorated by a rigid platelet attached to the center. The sublayer membrane is attached with two weights, a central rigid platelet and a concentric ring with inner radius e. The influences of the distribution and number of the attached mass, also asymmetric structure on the acoustic attenuation characteristics of the CMAM, are discussed. Findings In this paper, the acoustic performance of asymmetric coupled-membrane metamaterial structure is discussed. The influences of mass number, the symmetric and asymmetry structure on the sound insulation performance are analyzed. It is shown that increasing the number of mass attached on membrane, structure exhibits low-frequency and multi-frequency acoustic insulation phenomenon. Compared with the symmetrical structure, asymmetric structure shows the characteristics of lightweight and multi-frequency sound insulation, and the sound insulation performance can be tuned by adjusting the distribution mode and location of mass blocks. Originality/value Membrane-type local resonant acoustic metamaterial is an ideal low-frequency sound insulation material for its structure is simple and lightweight. How to effectively broaden the acoustic attenuation band at low frequency is still a problem. But most of researchers focus on symmetric structures. In this study, the asymmetric coupled-membrane acoustic metamaterial structure is examined. It is demonstrated that the asymmetric structure has better sound insulation performances than symmetric structure.

scholarly journals Light-weight large-scale tunable metamaterial panel for low-frequency sound insulation

2020 ◽  
Vol 13 (6) ◽  
pp. 067003
Author(s):  
Hao Zhang ◽  
Shengbing Chen ◽  
Zongzheng Liu ◽  
Yubao Song ◽  
Yong Xiao
Keyword(s):  
Large Scale ◽  
Low Frequency ◽  
Sound Insulation ◽  
Light Weight ◽  
Frequency Sound ◽  
Tunable Metamaterial

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

An acoustic metamaterial composed of multi-layer membrane-coated perforated plates for low-frequency sound insulation

2015 ◽  
Vol 106 (15) ◽  
pp. 151908 ◽  
Author(s):  
Li Fan ◽  
Zhe Chen ◽  
Shu-yi Zhang ◽  
Jin Ding ◽  
Xiao-juan Li ◽  
...  
Keyword(s):  
Low Frequency ◽  
Sound Insulation ◽  
Perforated Plates ◽  
Acoustic Metamaterial ◽  
Frequency Sound ◽  
Layer Membrane

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.

Broadband plate-type acoustic metamaterial for low-frequency sound attenuation

2012 ◽  
Vol 101 (17) ◽  
pp. 173505 ◽  
Author(s):  
M. Badreddine Assouar ◽  
Matteo Senesi ◽  
Mourad Oudich ◽  
Massimo Ruzzene ◽  
Zhilin Hou
Keyword(s):  
Low Frequency ◽  
Sound Attenuation ◽  
Acoustic Metamaterial ◽  
Frequency Sound ◽  
Plate Type

scholarly journals Study on broadband low-frequency sound insulation of multi-channel resonator acoustic metamaterials

AIP Advances ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 045321
Author(s):  
Chi Xu ◽  
Hui Guo ◽  
Yinghang Chen ◽  
Xiaori Dong ◽  
Hongling Ye ◽  
...  
Keyword(s):  
Low Frequency ◽  
Sound Insulation ◽  
Acoustic Metamaterials ◽  
Frequency Sound

scholarly journals Plate-Type Acoustic Metamaterials: Experimental Evaluation of a Modular Large-Scale Design for Low-Frequency Noise Control

Acoustics ◽  
2019 ◽  
Vol 1 (2) ◽  
pp. 354-368 ◽  
Author(s):  
Linus Ang ◽  
Yong Koh ◽  
Heow Lee
Keyword(s):  
Large Scale ◽  
Noise Control ◽  
Traffic Noise ◽  
Low Frequency ◽  
Industrial Applications ◽  
Frequency Noise ◽  
Acoustic Metamaterials ◽  
Scale Design ◽  
Stress Uniformity ◽  
Plate Type

For industrial applications, the scalability of a finalised design is an important factor to consider. The scaling process of typical membrane-type acoustic metamaterials may pose manufacturing challenges such as stress uniformity of the membrane and spatial consistency of the platelet. These challenges could be addressed by plate-type acoustic metamaterials with an internal tonraum resonator. By adopting the concept of modularity in a large-scale design (or meta-panel), the acoustical performance of different specimen configurations could be scaled and modularly combined. This study justifies the viability of two meta-panel configurations for low-frequency (80–500 Hz) noise control. The meta-panels were shown to be superior to two commercially available noise barriers at 80–500 Hz. This superiority was substantiated when the sound transmission class (STC) and the outdoor-indoor transmission class (OITC) were compared. The meta-panels were also shown to provide an average noise reduction of 22.7–27.4 dB at 80–400 Hz when evaluated in different noise environments—traffic noise, aircraft flyby noise, and construction noise. Consequently, the meta-panel may be further developed and optimised to obtain a design that is lightweight and yet has good acoustical performance at below 500 Hz, which is the frequency content of most problematic noises.

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