Sound transmission loss of multi-layered elastic micro-perforated plates in an impedance tube

Kim, Hyun‐Sil; Ma, Pyung-Sik; Kim, Bong-Ki; Lee, Seong-Hyun; Seo, Young-Jin

doi:10.1016/j.apacoust.2020.107348

Cited by 22 publications

(9 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The slit plates are 3D printed by using photosensitive resin, whose mass density ρ p = 1150kg • m −3 , elastic modulus E p = 2.6 GPa and Poisson's ratio υ = 0.4 indicate that the samples are relatively soft and thin, and plate vibration caused by sound-structure coupling into the slit plates must be considered. Since the distance l p and plate thickness are much lower than the acoustic wavelength, the distributed particle velocity ṽ can be expressed as the average of the plate velocity v p and the fluid velocity v s through the slit [38][39][40][41]:…”

Section: Design and Theorymentioning

confidence: 99%

A subwavelength ventilated structure for efficient broadband sound insulation

Hong

Sun

Tang

et al. 2023

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Multifunctional structures such as ventilated sound barriers, have become the focus of recent research on the noise reduction and environmental comfort. However, its large size and complex inner structure hinder its potential applications. Novel structures with side-branch sectorial Helmholtz resonators (SHRs) and double-layered perforated slit plates enlightened by macro- perforated plates to enhance the soundproof performance and facilitate natural ventilation are proposed and experimentally validated. Compared with simple muffler ducts, the combinations with slit plates provide a smoother transmission loss (TL) curve with a broad and continuous TL band. We also study the influences of the independent parts and interactive effects of the assembly on the sound field, including the frequency migration and plate vibration. The proposed sub-wavelength structures with a thickness of 15mm can obtain TL values up to 25dB with a broad bandwidth from 930Hz to 1600Hz. Moreover, soundproof walls can be fabricated by using these structures with plenty of ventilated slits to freely exchange air and heat. This ventilation sound barrier is suitable for acoustic landscape buildings as it covers the main frequency spectrum of a human equal loudness contour.

show abstract

Section: Design and Theorymentioning

confidence: 99%

A subwavelength ventilated structure for efficient broadband sound insulation

Hong

Sun

Tang

et al. 2023

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…Among them, F 0 = −25, C = 4000 and random term is ε t . Then, the ADF test is also required, with reference p ≤ 0.05 to determine the significance level [60][61][62]. Small variance and standard deviation and the calculated result values can be within the accepted range.…”

Section: Examplementioning

confidence: 99%

ARIMA-FEM Method with Prediction Function to Solve the Stress–Strain of Perforated Elastic Metal Plates

Chen

Dai

Zheng

2022

Metals

View full text Add to dashboard Cite

Stress analysis and deformation prediction have always been the focuses of the field of mechanics. The accurate force prediction in plate deformation plays important role in the production, processing and performance analysis of materials. In this paper, we propose an ARIMA-FEM method, which can be used to solve some mechanical problems of 2D porous elastic plate. We have given a detailed theory and solving steps of ARIMA-FEM. In addition, three numerical examples are given to predict the stress–strain of thin porous elastic metal plates. This article uses CST, LST and Q4 elements to discrete the rectangular plates, square plates and circle plates with holes. As for variable force prediction, this paper compared with linear regression, nonlinear regression and neural network prediction, and the results show that the ARIMA method has a higher prediction accuracy. Furthermore, we calculate the numerical solution at four mesh scales, and the numerical convergence is consistent with the theoretical convergence, which also shows the effectiveness of our method. The image smoothing algorithm is applied to keep edge information with high resolution, which can more concisely describe the plate internal changes. Finally, the application scope of ARIMA-FEM, model expansion, superconvergence analysis and other issues have been given enlightening views in the discussion section. In fact, this algorithm combined statistics and mechanics. It also reflects the knowledge integration of interdisciplinary and uses it better to serve practical applications.

show abstract

“…Kim et al. [344] used TMM to analyze the sound behavior of a multilayered elastic MPP in an impedance tube. To confirm the accuracy of the offered procedure, the STLs of the single, double, and triple MPP were determined and compared with that of the FE method.…”

Section: Vibroacoustic Solutionmentioning

confidence: 99%

Prediction of acoustic wave transmission features of the multilayered plate constructions: A review

Zarastvand

Ghassabi

Talebitooti

2021

Jnl of Sandwich Structures & Materials

View full text Add to dashboard Cite

This study collects all of the existent papers in the field of acoustic transmission across multilayered plate constructions. Herewith, a comprehensive source is proposed wherein approximately 410 references are reviewed and described from the first [Formula: see text] to [Formula: see text]. In the first part, in addition to the presentation of a complete explanation about the importance of the acoustic analysis of these structures, appropriate formulations are also provided. Furthermore, an overview of the thematic correspondent is carried out. Since the type of material used in these constructions can be very important in sound insulation, the significance of this subject is remarked. The papers are then classified based on their acoustic excitation fields containing plane wave, diffuse, random, and point source. After analyzing the research approaches according to different environmental properties, the articles are ordered based on their boundaries as finite and infinite. To present reliable outcomes, it is necessary to investigate a proper theory proportional to the structure’s thickness. Herewith, this issue is also discussed in detail. The review is also expanded to focus on the different vibroacoustic solutions. Before concluding remarks, the authors' research works are presented wherein either optimization algorithms or control techniques improve the acoustic performance of these structures.

show abstract

Sound transmission loss of multi-layered elastic micro-perforated plates in an impedance tube

Cited by 22 publications

References 30 publications

A subwavelength ventilated structure for efficient broadband sound insulation

A subwavelength ventilated structure for efficient broadband sound insulation

ARIMA-FEM Method with Prediction Function to Solve the Stress–Strain of Perforated Elastic Metal Plates

Prediction of acoustic wave transmission features of the multilayered plate constructions: A review

Contact Info

Product

Resources

About