A two-dimensional approach for sound attenuation of multi-chamber perforated resonator and its optimal design

Guo, Rong; Wang, Liting; Tang, Wenbo; Han, Shihao

doi:10.1016/j.apacoust.2017.05.030

Cited by 12 publications

(3 citation statements)

References 19 publications

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“…The theoretical formula of Helmholtz resonator is of great error for micro-perforated plates usage, and should calculated by numerical simulation in the field of MPPs design and application. 16…”

Section: Discussionmentioning

confidence: 99%

Numerical simulations and experiments on thermal viscous power dissipation of perforated plates

Gang

Liu

et al. 2018

AIP Advances

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The micro-perforated plates (MPPs) are widely used in sound absorption structures. As perforations become smaller, the energy loss caused by viscous dissipation and thermal radiation of the medium should be considered on calculation and design of the MPPs. In this paper, the energy loss of thin tube, micro tube and capillary tube are analyzed by using the finite element method (FEM). The acoustic finite element models of MPPs are created, and the power dissipation, impedance, resonant frequency, absorption coefficient and correction length of perforated plates are analyzed. The impedance experiments are carried to test the numerical results. This paper approves that the energy loss caused by thermal and viscous should be considered on MPPs, which is determined by air viscous, and affected by the diameter of perforations, porosity and frequency. The resonant frequency is affected by viscous. The theoretical formula of Helmholtz resonator cause great error for micro-perforated plates usage, and it should be calculated by numerical simulation in the field of MPPs design and application.

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Section: Discussionmentioning

confidence: 99%

Numerical simulations and experiments on thermal viscous power dissipation of perforated plates

Gang

Liu

et al. 2018

AIP Advances

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“…Muffler ducts are widely applied in gas emission and air exchange systems with fast flow rates [6], and as a key functional structure, the side-branch resonators are communicated through the main duct or slit channel for better performance of sound insulation and absorption [7][8][9]. Ducts with various side-branch Helmholtz resonator (HR) arrays, such as ringtype HRs [10,11], multi-order HRs [12][13][14], double-fishnet plates with HRs in the central layer [15], and circular HRs with shape modification, expand the attenuation bandwidth and transmission loss (TL) values [8,16,17]. Based on the theory of slow waves, simple grating arrays are installed on the inner or outer walls of ducts [18,19].…”

Section: Introductionmentioning

confidence: 99%

A subwavelength ventilated structure for efficient broadband sound insulation

Hong

Sun

Tang

et al. 2023

J. Phys. D: Appl. Phys.

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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.

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“…If lowfrequency noise has to be eliminated, the expansion chamber of this type of muffler has to be long, requiring a large muffler. Traditional expansion chamber mufflers suffer from periodic transmission loss and do not eliminate noise at the passing frequency [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Study on the Transmission Loss of a Side Outlet Muffler

Zhang

Shi

Zeng

et al. 2020

Shock and Vibration

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Vibration and noise reduction methods are important research directions in many industries. Mufflers are widely used in pipelines to reduce noise and vibration transmission. A theoretical analysis is conducted to determine the noise reduction mechanism of a muffler with a side outlet, and the results are verified with experiments. The quadrupole parameters of the muffler are obtained using transfer matrix analysis, and sensitivity analysis of the quadrupole parameters is conducted. The influence of the side outlet location on the transmission loss of the muffler is investigated experimentally using an impedance tube. The key factors affecting the transmission loss are analyzed. The theoretical calculation results of the transmission loss of the side outlet muffler are in good agreement with the experimental results.

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A two-dimensional approach for sound attenuation of multi-chamber perforated resonator and its optimal design

Cited by 12 publications

References 19 publications

Numerical simulations and experiments on thermal viscous power dissipation of perforated plates

Numerical simulations and experiments on thermal viscous power dissipation of perforated plates

A subwavelength ventilated structure for efficient broadband sound insulation

Theoretical and Experimental Study on the Transmission Loss of a Side Outlet Muffler

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