Avaliação de propriedades fono-absorventes de materiais para painéis de revestimento

Abstract

Sustainable architecture demands solutions that prioritize the user's comfort inside of the construction. Noise reduction is an important item to be taken to under consideration in the obtaining of this comfort, and it involves much the acoustic isolation the sound absorption. There are ploughs adds products on market, such acoustic blankets and acoustic panels, which ploughs widely used by architects. However, they don't satisfy all the demands of the market, and many teamsters ploughs of high cost or of not fit esthetically you the projected atmosphere. This becomes worse in marries of materials with absorbing characteristics.Panels of MDF perforated associated you glass wool blankets ploughs lives commonly used when it is wanted the sound to be absorbed, mainly in the low frequencies. However, those panels, whose making is expensive and complex, can only be used in atmospheres due thecharacteristics of MDF. In this work, the uses of new materials was evaluated will be the making of absorbing panels with MDF wood panel and covered glass wool blankets being taken reference. Initially samples made out of terrazzo and concrete with addition of fibers were made. Taking into consideration the preliminary results, we opted will be the study of the acoustic behavior of mini perforated concrete acoustic panels with polymeric and metallic fibers, and different systems obtained with the association of this concrete you sound-absorbing blankets available in the market and layers of to air. After the making, the concrete material which is being tested and MDF, associated or not you blanket/air weresubmitted for tests of acoustic absorption using the method of the impedance tube. Bending tests were also performed in samples of both materials. The results indicate that the concrete perforated with addition of polymeric or metallic is less resistant bending than the sample of MDF available in the market. However, they obtained values make possible itsuses panels that could be used in any spaces. In terms of acoustic performance, the results indicate the system constituted by the concrete with addition of fibers (polymeric or metallic), Isosound blanket with ash woven and to layer of to air is the most effective will be absorption of bass sounds. With the results obtained in the experiment, it is possible youconsider new finishing, lives flexible option used usually.