Abstract
In view of the potential of aerogels for use in double-glazed window systems, sound transmission loss (STL) of aerogel-based glazing systems has been theoretically computed using the wave impedance approach and the results compared with corresponding values for conventional glazing. The results show a significant change in the double-leaf resonance frequencies caused by the aerogel layers and suggest that by selecting suitable material properties, aerogel glazing systems can be made acoustically superior to equivalent conventional glazing in a chosen frequency rage. The STL values for the glazing systems with aerogel of the highest density studied (285 kg/m 3) were found to be significantly better than those of air-based glazing systems.
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