Isolamento acústico aéreo em campo de partições verticais em construção light steel framing, em habitações unifamiliares

Abstract

Because of accelerated urban growth, and the resulting caused environmental problems, there is evidence of a deterioration of the urban noise in cities, affecting among other things the sound quality in the spaces. At this juncture the acoustic performance of building system should provide minimization of unfavorable acoustic conditions to reduce the maximum noise that can affect hearing and cause discomfort. Nowadays, the construction industry sees the introduction of more effective systems from an environmental point of view. In this context, there is the Light Steel Framing (LSF), whose marketing propagates an efficient acoustic performance. This study aimed to evaluate the acoustic performance of vertical partitions in two residential buildings with LSF type structure, and different materials in its conformation, one with acoustic absorber and the other not. The survey was conducted from a quantitative analysis, according to measurements in field of sound insulation of Internal and External Vertical Seals System (SVVIE) of selected objects of study, and a subsequent qualitative analysis, due to the comparison of results obtained in field with insulation levels set out in national standard NBR 15575-4: 2013, the international standards HUD: 1967 CEQR: 2012 and HAL: 2012, with the criteria for qualification of sound insulation in relation to speech intelligibility and with existing studies In the literature regarding the acoustic performance of other construction systems. And existing studies of acoustic performance conducted in other building systems. In the quantitative analysis, the results showed that the walls with window frames in your configuration have lower sound insulation indexes that the indexes certificates in blind walls in both the objects of study. On the other hand, the blind walls with rock wool achieved higher insulation values blind walls without front absorber, although they presented smaller thickness. Regarding the qualitative analysis, it was found that the acoustic performance of the rated system meets the requirements of national standard, but is not compatible with international standards, in the two objects of study. Comparison with other building systems, it was established that the values obtained in the field are comparable or superior