Design of Replicated Open-Pore Aluminium Cellular Materials with a Non-Stochastic Structure for Sound Absorption Applications

Abstract Several porous materials, especially natural fibres and polyurethane foams, are frequently used as sound absorbers in multiple noise reduction applications. Notwithstanding their excellent absorption performance, these materials usually lack the structural strength fire resistance required for use aggressive environments or situations requiring stability. This paper proposes design of open-pore polymer aluminum cellular with non-stochastic structures absorption. These were fabricated using additive manufacturing (polymeric materials) replication method (aluminum materials), which involves infiltrating preforms formed by compacting spheres a martyr material, such NaCl, liquid aluminum. The proposed can be employed resonator system when backed an air cavity, change cavity depth to tune its peak. Following standard ASTM E1050, was investigated. In addition, performance predicted Equivalent Circuit Method model. experimental results consistent those model, highlighting potential microstructural configurational absorbers. Graphical