Sound transmission loss in functionally graded porous metastructural plate with absorber

Taghipour, A.H.; Dardel, Morteza

doi:10.1177/10775463231151267

Cited by 1 publication

(1 citation statement)

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“…Moreover, Choy, Huang, and Wang [11] investigated the possibility of filling porous materials with low-density gas to extend the effective frequency range of sound absorption to lower frequencies and conducted experimental confirmation to support their findings. The research on the sound transmission loss of a two-plate functionally graded sandwich structure with a porous core has demonstrated that the use of FGP plates and absorbers can increase sound transmission loss, and the simultaneous use of both is effective at high frequencies [12]. W.H.…”

Section: Introductionmentioning

confidence: 99%

Sound Absorption Characteristics of Unsaturated Porous Material Calculated by Modified Transfer Matrix Method

Yin,

Guan

2024

Buildings

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Porous materials have emerged as one of the most widely employed sound-absorbing materials in practical applications, owing to their excellent sound absorption properties and lightweight nature. Unsaturated porous materials have the potential to achieve superior sound absorption effects and significantly reduce mass. However, current research on the sound absorption performance of unsaturated porous materials is limited. This paper used a modified transfer matrix method (MTMM), which relies on matrix dimensionality reduction, to analyze the sound absorption characteristics of unsaturated porous materials under various boundary conditions. The study also examines the impact of different parameters, such as material thickness and saturation, on sound absorption performance and compares the results. The findings indicate that when a solid elastic plate is attached to an unsaturated porous elastic plate, the absorption coefficient decreases while the transmission loss increases. Additionally, reducing the thickness of the plate and increasing its porosity and saturation levels lead to an increase in the absorption coefficient and a decrease in the transmission loss.

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Section: Introductionmentioning

confidence: 99%