CHARACTERIZATION OF PERFORMANCE ACOUSTIC SANDWICH COMPOSITE WITH A CORE OF POLYURETHANE FOAM-AGAVE SISALANA FIBER REINFORCED POLYESTER FOR NOISE ABSORPTION

摘要

Absorber material has characteristic of acoustic that reflect and absorb sound wave. Absorption by porous material is very useful to reduce the sound power level that occurs so as to reduce the noise in the room. The sound absorbtion coefficient of the Ac