Comportamiento acústico de la fachada ventilada con revestimiento ligero. Análisis de la variación según las características de la ventilación

摘要

This thesis examines the sound insulation qualities of fagade buildings with barrier protection against exterior airborne noise. This research is focused specifically on the acoustic performance of Lightweight Ventilated Fagades (LVFs) with exterior claddings. The properties LVFs are an important line of research because they are now commonly used in new buildings, and because many buildings from twentieth century, especially those built before the 70s, in Spain and other Euro Zone countries require renovation to the exterior walls for aesthetic reasons, for better insulation and to meet new low energy consumption requirements. In Spain, the current «Código Técnico de la Edificación» (CTE) regulation does not allow for the consideration of exterior cladding with an air cavity to a pre-existing fagade when meeting airborne sound reduction requirements. However there is evidence that applying an exterior cladding with an air cavity can improve the overall airborne sound insulation in a fagade, with respect to the pre-existence wide and heavy wall. The level of reduction is dependent on the inner characteristics of the air cavity how thicl