Improving low-frequency sound absorption of micro-perforated panel absorbers by using mechanical impedance plate combined with Helmholtz resonators

Xiaodan, Zhao; Yu, Yong-jie; Wu, Yuanjun

doi:10.1016/j.apacoust.2016.07.013

Cited by 69 publications

(14 citation statements)

References 6 publications

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“…Therefore, nowadays, environment noise control is becoming a subject of great interest. Generally, common sound absorbing materials could be divided into two categories: resonant [2] and poro-elastic materials. Resonant materials for sound absorption mainly involve Helmholtz resonators [3] and/or perforated panels [4].…”

Section: Introductionmentioning

confidence: 99%

Formulation and validation of the shift cell technique for acoustic applications of poro-elastic materials described by the Biot theory

Magliacano

Ashani

Ouisse

et al. 2021

Mechanical Systems and Signal Processing

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The inclusion of vibroacoustic treatments at early stage of product development through the use of poro-elastic media with periodic inclusions, which exhibit proper dynamic filtering effects, is a powerful strategy for the achievement of lightweight sound packages and represents a convenient solution for manufacturing aspects. This can have different applications in transportation (aerospace, automotive, railway), energy and civil engineering fields, where weight, space and vibroacoustic comfort are still critical challenges. This paper develops the shift cell operator approach as a numerical tool to investigate the dispersion characteristics of periodic poro-elastic media. It belongs to the class of the k(ω) (wave number as a function of the angular frequency) methods and leads to a quadratic eigenvalue problem, even when considering frequency-dependent materials, contrarily to the ω(k) approach that would lead to a non-linear eigenvalue problem for frequency-dependent materials.

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Section: Introductionmentioning

confidence: 99%

Formulation and validation of the shift cell technique for acoustic applications of poro-elastic materials described by the Biot theory

Magliacano

Ashani

Ouisse

et al. 2021

Mechanical Systems and Signal Processing

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“…Researchers examined the application of woven fabrics as sound-absorbent materials both experimentally and theoretically. [1][2][3][4][5][6][7][8][9][10][11]. The utilization of woven fabric as a material that has the potential to be used as a sound absorber material was reported by Shoshani and Rosenhouse [1].…”

Section: Introductionmentioning

confidence: 99%

A Novel Theoretical Modeling for Predicting the Sound Absorption of Woven Fabrics Using Modification of Sound Wave Equation and Genetic Algorithm

Putra

Irwan

Wijayono

et al. 2021

Autex Research Journal

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Woven fabric in Indonesia is generally known as a material for making clothes and it has been applied as an interior finishing material in buildings, such as sound absorbent material. This study presents a new method for predicting the sound absorption of woven fabrics using a modification of the wave equations and using genetic algorithms. The main aim of this research is to study the sound absorption properties of woven fabric by modeling using a modification of the sound wave equations and using genetic algorithms. A new model for predicting the sound absorption coefficient of woven fabric (plain, twill 2/1, rips and satin fabric) as a function of porosity, the weight of the fabric, the thickness of the fabric, and frequency of the sound wave, was determined in this paper. In this research, the sound absorption coefficient equation was obtained using the modification of the sound wave equation as well as using genetic algorithms. This new model included the influence of the sound absorption coefficient phenomenon caused by porosity, the weight of the fabric, the thickness of fabric as well as the frequency of the sound wave. In this study, experimental data showed a good agreement with the model

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“…Substantial works have focused on introducing additional Helmholtz resonators [17][18][19] or mechanical vibration [20,21] coupled with the MPP to improve its low-frequency sound-absorption performance. The combination of electromechanical system [22], shunted circuit loudspeaker [23], or aluminum-electrode PVDF piezoelectric film [24] with the MPP is also presented to improve the sound-absorption performance, especially in the low frequency range.…”

Section: Introductionmentioning

confidence: 99%

Diffuse Sound Absorptive Properties of Parallel-Arranged Perforated Plates with Extended Tubes and Porous Materials

Li¹,

Chang

Liu

2020

Materials

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The diffuse sound absorption was investigated theoretically and experimentally for a periodically arranged sound absorber composed of perforated plates with extended tubes (PPETs) and porous materials. The calculation formulae related to the boundary condition are derived for the periodic absorbers, and then the equations are solved numerically. The influences of the incidence and azimuthal angle, and the period of absorber arrangement are investigated on the sound absorption. The sound-absorption coefficients are tested in a standard reverberation room for a periodic absorber composed of units of three parallel-arranged PPETs and porous material. The measured 1/3-octave band sound-absorption coefficients agree well with the theoretical prediction. Both theoretical and measured results suggest that the periodic PPET absorbers have good sound-absorption performance in the low- to mid-frequency range in diffuse field.

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Improving low-frequency sound absorption of micro-perforated panel absorbers by using mechanical impedance plate combined with Helmholtz resonators

Cited by 69 publications

References 6 publications

Formulation and validation of the shift cell technique for acoustic applications of poro-elastic materials described by the Biot theory

Formulation and validation of the shift cell technique for acoustic applications of poro-elastic materials described by the Biot theory

A Novel Theoretical Modeling for Predicting the Sound Absorption of Woven Fabrics Using Modification of Sound Wave Equation and Genetic Algorithm

Diffuse Sound Absorptive Properties of Parallel-Arranged Perforated Plates with Extended Tubes and Porous Materials

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