Web27 de jun. de 2024 · This titanium foam showed a good performance of sound absorption, and its sound absorption coefficient could be more than 0.6 in the sound-wave frequency range of 3150-6300. Hz and even exceed 0.9 ... WebThe sound absorption coefficient (α) and pore structure of the foam samples have been measure by using Impedance Tube test and Scanning Electron Microscopy (SEM).
Microstructure-based experimental and numerical investigations on …
Web2 de dez. de 2024 · The available research results show that the open-cell aluminum foam composite structure with double-layer sandwich cavity has better sound absorption performance at low and medium frequencies [8,9,10,11,12,13], and this study tries to investigate the sound absorption coefficient of the three-layer aluminum foam plus … Web1 de set. de 2024 · Closing a certain number of open pores can reduce the connectivity among the air, affect the viscous-heat phenomenon inside the PU foam, and hinder the propagation of sound waves inside the PU foam. Therefore, the sound absorption performance of the PU foam can be improved by changing the closed pore ratio. derry rates
(PDF) Sound Absorption Ability of Aluminium Foams - ResearchGate
WebOil spills not only cause significant economic losses; they also harm the environment. In this study, high-melt-strength polypropylene (HMSPP) and linear polypropylene (PP) were … Web30 de nov. de 2024 · Porous materials hold great potential in the field of sound absorption, but the most abundantly used materials, such as Polyurethane (PU) foam and polyvinyl chloride (PVC) foam, would inevitably bring environmental harms during fabrication. In this study, the nontoxic addition-molded room temperature vulcanized silicone rubber is … Web3 de jan. de 2024 · Improved Mechanical and Sound Absorption Properties of Open Cell Silicone Rubber Foam with NaCl as the Pore-Forming Agent Improved Mechanical and … chrysan bolton