The R2UTechnologies project was featured at EuroNoise 2025, held in Málaga, Spain, from 23 to 26 June 2025 with a paper presented by Reza Mohammadi Firouz. This major European event brought together experts in building acoustics and noise control to discuss advancements in sound insulation and comfort in construction. As part of the technical program, researchers from CERIS – Instituto Superior Técnico presented the paper “Acoustic performance of prefabricated reinforced concrete walls for modular constructions.” 

The study addressed a key challenge in modular building: ensuring effective acoustic insulation. Using a 3D harmonic finite element model in ANSYS®, several wall configurations were evaluated, including double-layer reinforced concrete panels with insulation cores in EPS or PUR. Results showed that thicker panels (220 mm) with PUR cores reached the highest airborne sound insulation (Rw = 54 dB), while EPS panels also performed well (Rw up to 48 dB).

Thinner panels (180 mm) were more suitable for interior partitions, showing lower insulation (Rw = 40–42 dB). All models exhibited a performance dip around 200 Hz, attributed to the coincidence effect typical in layered systems. This work reflects the project’s holistic approach to modular construction—combining structural robustness, efficiency, and user comfort, including thermal and acoustic performance.