Measurement and Simulation of the Sound Insulation of Double Leaf Facades with Openings for Natural Ventilation

Abstract

This paper deals with the acoustical properties of a double leaf facade with openings for natural ventilation. Specifically, we explore the potential for the prediction of the sound reduction index of such double leaf facades via acoustical simulation. The subject of the exploration is an experimental modular double-leaf system with multiple opening possibilities. Different elements can be opened in both layers, such that multiple opening configurations can be studied both empirically and computationally. The actual performance of the wall was captured via parametric laboratory measurements. The respective configurations were then modelled using a state-of-the-art room acoustics simulation program. Computer simulation and laboratory measurement results were compared. The results suggest that currently the acoustical performance of the double-leaf wall system cannot be accurately predicted using simulation. Likely reasons for this circumstance as well as potential improvements are discussed.