Comparison of strategies for the experimental analysis of airborne sound insulation of building elements

Regular paper

Luis Godinho

ITeCons, Universidade de Coimbra

Monday 1 june, 2015, 17:40 - 18:00

Auditorium 2 (592)

The experimental assessment of the acoustic performance of materials and construction elements is particularly relevant in the choice of system parts in the development and characterization process of new solutions. Different laboratory methodologies can be used for the analysis of airborne sound insulation, using different sample sizes, laboratory equipment or facilities. In an expedite manner, it is even possible to use an impedance tube to determine the transmission loss of circular samples with reduced dimensions of the materials to be characterized, and thus have a rough estimation of the real behaviour of the solution. On the other hand, using larger laboratory facilities, such as reverberant acoustical chambers, it is possible to determine the airborne sound insulation of the samples with more realistic and representative prototypes of the final elements. As is easily recognized, the time spent and resources used in these larger scale tests are substantially higher, although the acoustic behavior is closer to a real application. Thus, it is intended, in this work, to compare different methodologies for characterizing the airborne sound insulation of construction elements, highlighting the main advantages and disadvantages of the various processes and analyzing the main limitations detected.

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