Modular construction is being promoted as a solution to the problem of housing crisis as the demand for new construction continues to rise. However, the performance of this construction approach must be competitive with conventional construction methods. Therefore, beyond structural performance and safety features, indoor comfort qualities such as thermal and acoustic insulation should be considered. Acoustic transmission loss phenomena are generally governed by mass, and reinforced concrete (RC) walls are considered massive elements compared to other conventional building materials. However, it is still necessary to enhance such elements with insulation materials. In this study, the acoustic performance of double- layer prefabricated RC wall elements with embedded insulation layers is assessed under different configurations.

A 3D harmonic acoustic finite element (FE) numerical model is developed and verified to evaluate the sound reduction capability of the prefabricated double-layered concrete walls with different thicknesses. The effect of using various insulation materials is also discussed.