Alba Fernández J., Ramis Soriano J., Juliá Sanchis E., Escuder Silla E.

The absorbent materials of the sound are already common in acoustic solutions in the scope of the architectonic acoustics. These materials are part of multilayer configurations for sound insulation. They improve the insulating properties of the partition or they serve to control the excess of reverberation in enclosures in the acoustic conditioning to attenuate noise in conductions, etc. This type of materials are very diverse: recycled absorbents materials of plastic, organics, of fiber of polyester, conglomerates, etc. have appeared. At the moment, simple models exist with which to characterize these materials, based on empirical formulas from different measurements. These models usually are valid only for the studied material. In this work, a study of the behavior of these simple models is achieved, and valid empirical equations are proposed for a set of absorbent materials.