Theoretical analysis of the sound absorption characteristics of periodically stiffened micro-perforated plates

Zhou, Haian; Wang, Xiaoming; Mei, Yulin

doi:10.1007/s10409-014-0048-3

Cited by 8 publications

(4 citation statements)

References 34 publications

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“…For the acoustic impedance of a small circular tube (perforation), Maa proposed his modified equation based on the solution of Crandall 35 , as 36 37 :…”

Section: Theoretical Frameworkmentioning

confidence: 99%

Hybrid acoustic metamaterial as super absorber for broadband low-frequency sound

Tang

Ren

Meng

et al. 2017

Sci Rep

182

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A hybrid acoustic metamaterial is proposed as a new class of sound absorber, which exhibits superior broadband low-frequency sound absorption as well as excellent mechanical stiffness/strength. Based on the honeycomb-corrugation hybrid core (H-C hybrid core), we introduce perforations on both top facesheet and corrugation, forming perforated honeycomb-corrugation hybrid (PHCH) to gain super broadband low-frequency sound absorption. Applying the theory of micro-perforated panel (MPP), we establish a theoretical method to calculate the sound absorption coefficient of this new kind of metamaterial. Perfect sound absorption is found at just a few hundreds hertz with two-octave 0.5 absorption bandwidth. To verify this model, a finite element model is developed to calculate the absorption coefficient and analyze the viscous-thermal energy dissipation. It is found that viscous energy dissipation at perforation regions dominates the total energy consumed. This new kind of acoustic metamaterials show promising engineering applications, which can serve as multiple functional materials with extraordinary low-frequency sound absorption, excellent stiffness/strength and impact energy absorption.

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“…For the acoustic impedance of a small circular tube (perforation), Maa proposed his modified equation based on the solution of Crandall 35 , as 36 37 :…”

Section: Theoretical Frameworkmentioning

confidence: 99%

Hybrid acoustic metamaterial as super absorber for broadband low-frequency sound

Tang

Ren

Meng

et al. 2017

Sci Rep

182

View full text Add to dashboard Cite

show abstract

“…The thickness of the bottom plate (steel plate) d4 is fixed at 2 mm. In the model, the parameters of the damping layer are set as follows: the damping coefficient is 0.6, the Young's modulus is 100 Mpa, the shear modulus is 30 Mpa, and the density is 1.4 g/cm 3 .…”

Section: Influence Of the Parameters Of The Composite Resonance Plate On Its Sound Absorption Coefficientmentioning

confidence: 99%

“…Conventional materials have a limited ability to control low-frequency noise. Thus, due to their excellent low-frequency acoustic performance, micro-perforated plates have been extensively studied by scientific researchers [1][2][3]. In micro-perforated plates, the diameter of perforation is less than 1 mm; therefore, the broadband sound absorption effect is better than the resonance sound absorption in conventional perforated plates.…”

Section: Introductionmentioning

confidence: 99%

“…Yang et al [14] proposed a novel light sound-insulation composite plates made from aluminum honeycomb cores and microperforated panels and included GSGN film and sawdustboard. Their results show that the weighted sound-insulation index can reach 58.41 dB while the density is only 0.37 g/mm 3 . Hu et al [15] developed a composite resonance plate sound barrier composed of micro-perforated plates, resonance plates, damping layers, and galvanized steel plates, which greatly improved the sound insulation and sound absorption performance of low-frequency noise in substations.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of Sound Absorption and Insulation Performances of a Dual-Cavity Resonant Micro-Perforated Plate

Chen¹,

Guo²,

Feng³

et al. 2022

Fluid Dynamics &Amp; Materials Processing

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This study investigates a dual-cavity resonant composite sound-absorbing structure based on a micro-perforated plate. Using the COMSOL impedance tube model, the effects of various structural parameters on sound absorption and sound insulation performances are analyzed. Results show that the aperture of the micro-perforated plate has the greatest influence on the sound absorption coefficient; the smaller the aperture, the greater is this coefficient. The thickness of the resonance plate has the most significant influence on the sound insulation and resonance frequency; the greater the thickness, the wider the frequency domain in which sound insulation is obtained. In addition, the effect of filling the structural cavity with porous foam ceramics has been studied, and it has been found that the porosity and thickness of the porous material have a significant effect on the sound absorption coefficient and sound insulation, while the pore size exhibits a limited influence.

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The vibroacoustic response and sound absorption performance of multilayer, microperforated rib-stiffened plates

Zhou

Wang

et al. 2017

Acta Mech. Sin.

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Theoretical analysis of the sound absorption characteristics of periodically stiffened micro-perforated plates

Cited by 8 publications

References 34 publications

Hybrid acoustic metamaterial as super absorber for broadband low-frequency sound

Hybrid acoustic metamaterial as super absorber for broadband low-frequency sound

Optimization of Sound Absorption and Insulation Performances of a Dual-Cavity Resonant Micro-Perforated Plate

The vibroacoustic response and sound absorption performance of multilayer, microperforated rib-stiffened plates

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