The Analysis of Factors That Influence the Sound Absorption Coefficient of Porous Materials

In this paper are presented researches on the identification of factors that influence the sound absorption coefficient of porous materials used for absorption of the sound wave. To achieve these researches were used three materials (glass wool, flexible polyurethane foam and rigid polyurethane foam) for which it was determined the sound absorption coefficient using the impedance tube and was analyzed the influence of thickness, density and...