Sound absorption properties of microperforated panel with membrane cell and mass blocks composite structure

Gai, Xiao-Ling; Xing, Tuo; Li, Xianhui; Zhang, Bin; Cai, Ze-Nong; Wang, Fang

doi:10.1016/j.apacoust.2018.03.013

Cited by 47 publications

(14 citation statements)

References 14 publications

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“…In the following discussion, the porous material chosen in the simulation is the Basotect TG foam (BASF(China) Co. Ltd., Beijing, China). The period length, T, is much smaller than the wavelength of the incident wave, so the sound-absorption coefficient and the normalized impedance can be calculated by using Equations (20) and (21), respectively. Three absorption peaks observed at 160, 210 and 275 Hz are owning to the Helmholtz resonances of the PPETs, while the fourth peak, observed at 800 Hz, is the resonance frequency provided by the porous material.…”

Section: Surface Impedance Of Porous Materialsmentioning

confidence: 99%

“…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%

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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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Section: Surface Impedance Of Porous Materialsmentioning

confidence: 99%

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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“…4 This material is mainly classified into resonant sound-absorption material 5 and porous/fibrous absorption material. 6 Permeable membrane absorbers 7 and perforated panel absorbers 8 are some examples of resonant sound-absorption material that has limited application due to its narrow range of frequency, while porous/fibrous absorption material delivers more benefits and has extensive application because of its broader range of frequency, facile fabrication, economical, convenience in handling, and efficient properties. 7 Utilizing a porous and fibrous material for absorbing sound energy has been comprehensively appreciated to refrain the sound from reflecting, creating echo, and reverberation.…”

Section: Introductionmentioning

confidence: 99%

Excellent Wideband Acoustic Absorption of a Multifunctional Composite Fibrous Panel with a Dual-Pore Network from Milled Corrugated Box Wastes

Ruello

Pornea

Puguan

et al. 2022

ACS Appl. Polym. Mater.

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A multifunctional composite fibrous sound-absorption panel was acquired via sustainable fabrication from milling corrugated cardboard box wastes to unleash its fibrous property, creating a high-porosity material. Here, a multifunctional composite fibrous panel from the milled fibers of corrugated cardboard boxes reinforced by cross-linked polyvinyl alcohol as a biodegradable binder is generated. It is designed to have a dual-pore structure with a low density of 0.04 g/cm3, which can withstand a load of 5000 times its weight and is effective for the dissipation of sound at a wide range of frequencies. The prepared material demonstrates an excellent average absorption coefficient of 0.83 at wideband frequency, which is about 280–6300 Hz. The outstanding sound absorption performance of the material is primarily ascribed to its dual-pore architecture, the anisotropic pores interconnected by the random pores formed from the collection of cardboard box fibers within the architecture of the porous material, its thickness, and the concentration of corrugated box fibers. Furthermore, the prepared material manifests a unique porous morphological structure, favorable thermal properties, excellent mechanical stability and sustainability, and superhydrophobic properties. The successful fabrication of this riveting material endowed a promising result that may be applicable for various types of applications.

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“…e irregular-shaped cavity-backed MPPA [8,9] is proposed to enhance the vibro-acoustic coupling effect and effectively broaden the absorption bandwidth. In addition, filling the cavity with anisotropic fibrous material [10], decreasing the MPP holes diameter and thickness [11], and composing the MPPA with metamaterials [12,13] and Helmholtz resonance structure [14] can also broaden the sound absorption bandwidth. e abovementioned works significantly improve the sound absorption of the MPPA in the mid-high-frequency range.…”

Section: Introductionmentioning

confidence: 99%

Error Sensing Strategy for Active Control of Low‐Frequency Sound Absorption of Micro‐Perforated Panel Absorber by Using a Point Force Controlled Thin Plate

Chen

Wang

et al. 2021

Shock and Vibration

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This paper presents an analytical investigation on constructing an error sensing strategy of a new type of active MPPA. The proposed active MPPA is composed of MPP, air cavity, and point force-controlled backing panel, which can actively improve the low-frequency sound absorption of the MPPA. Constructing an appropriate error sensing strategy for obtaining an error signal that is highly correlated with the sound absorption coefficient of the active MPPA is a key problem encountered in practical implementation. The theoretical model of the active MPPA is firstly established using the modal analysis approach. Then, the active control performance and surface impedance characteristics in the controlled condition are analyzed in detail. Finally, the error sensing strategy of the active MPPA is constructed by measuring the surface average impedance ratio with an acoustic vector sensor (AVS). Simulation results show that, due to the antisymmetric property of the vibration of the backing panel on the resonant frequency, the surface impedance of the active MPPA after control also has symmetry or antisymmetry properties. Hence, the surface average impedance ratio of the active MPPA can be measured by using the limited number of acoustic vector sensors (sensing pressure and particle velocity). This variable is also highly correlated with the sound absorption coefficient of the active MPPA and thus can be used to construct the cost function (error signal). The active control result obtained by the proposed error sensing strategy is in good agreement with the theoretically optimal result, which validates the feasibility of this approach.

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Sound absorption properties of microperforated panel with membrane cell and mass blocks composite structure

Cited by 47 publications

References 14 publications

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

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

Excellent Wideband Acoustic Absorption of a Multifunctional Composite Fibrous Panel with a Dual-Pore Network from Milled Corrugated Box Wastes

Error Sensing Strategy for Active Control of Low‐Frequency Sound Absorption of Micro‐Perforated Panel Absorber by Using a Point Force Controlled Thin Plate

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