DETERMINATION OF ACOUSTIC PARAMETERS OF BIO-BASED MATERIALS DISTENDED FOR BUILDING: APPLICATION CASE TO ALEPPO PINE WOOD CORK AND THEIR COMPOSITES

摘要

In this work, we are interested to incorporating acoustic comfort in buildings by using bio-based materials. More specifically, this work aims to determinate experimentally the sound absorption coefficient (a) and the sound reduction index (R) in three different samples. The first sample consists of Aleppo pine wood (Pinus halepensis) with two different configurations (solid wood and laminated timber wood). The second sample consists of a black agglomerated cork (suber) with two different thicknesses. The third sample consists of sandwich assemblies obtained by superimposing two wooden layers (solid or laminated timber wood) bonded with an inter layer cork. In this experimentation, we have used Kundt tube to determine sound absorption coefficient and AcouSYS V2.0 software to predict the sound reduction index. The obtained results showed that the first parameter (a) is influenced by the thickness of material. The second parameter (R) of symmetrical and asymmetrical sandwich assemblies of solid laminated timber wood with an interlayer of black agglomerated cork even shows good performances.