Scalability of a metamaterial-based window

This paper presents the comparison of a reduced-size Acoustic Metawindow (AMW) unit with a full-scale Acoustic Metawindow (AMW) using a numerical analysis mimicking the experimental setup according to ISO 10140 standards. It evaluates the scalability of a metamaterial-based window for simultaneous noise control and natural ventilation. A FEM analysis through commercial software was used to replicate the experimental conditions outlined by ISO 10140-2 for sound insulation and ISO 9972 for air permeability. The findings demonstrate that the full-scale AMW provides similar sound attenuation performance compared to the AMW unit, achieving a sound insulation of 5-22 dB in the 100-5000 Hz range. Moreover, the full-scale AMW allows a higher airflow rate in terms of natural and mixed ventilation (using a ?P from 10 Pa to 80 Pa). Therefore, this AMM-based window seems to have great scalability potential, confirming its feasibility for real-world applications in buildings requiring high indoor comfort standards. Future research will carry out experimental verifications and extend this work by evaluating the energy performance of the AMW across different climatic conditions and usage patterns. The results contribute to advancing metamaterial applications in architectural acoustics and sustainable building design.