LAUSR

Today, the acoustic comfort of dwellings is revealed as a very important factor in the context of overall comfort of its inhabitants. For this comfort, it contributes very importantly the sound insulation that the facades of buildings can provide. Since the facades comprise of an opaque portion and a translucent portion, the latter will be more relevant to the sound insulation that the facade element provides, which is influenced by the window itself, as by the openings and air permeability associated with. In order to evaluate the influence of the possible differences of acoustic insulation on a residential facade over time, an experimental study was developed in LNEC. The experimental work was based on a set of acoustic and air permeability tests considering several opening areas, between 0,5 cm² and 250 cm², in a given test window. The results obtained allow to evaluate in which direction the sound insulation versus air permeability can parameterize the performance of the facades of buildings, and what is its relationship to the well-being of residents. For the 0.5 and 1 cm² areas of aperture, no acoustic or air permeability differences were found in relation to the reference values, assuming that this scenario does not cause any significant variation in a housing facade. For the last two areas studied (200 and 250 cm²), in acoustic and air permeability terms, it is concluded that, for these areas, the scenario is similar to that of an open window due to the high loss of sound insulation and the low air permeability.Today, the acoustic comfort of dwellings is revealed as a very important factor in the context of overall comfort of its inhabitants. For this comfort, it contributes very importantly the sound insulation that the facades of buildings can provide. Since the facades comprise of an opaque portion and a translucent portion, the latter will be more relevant to the sound insulation that the facade element provides, which is influenced by the window itself, as by the openings and air permeability associated with. In order to evaluate the influence of the possible differences of acoustic insulation on a residential facade over time, an experimental study was developed in LNEC. The experimental work was based on a set of acoustic and air permeability tests considering several opening areas, between 0,5 cm² and 250 cm², in a given test window. The results obtained allow to evaluate in which direction the sound insulation versus air permeability can parameterize the performance of the facades of buildings, and what...