Acoustic and ventilation performance of a dual-opening ventilated window: Design, fabrication, and laboratory evaluation

An acoustically optimized ventilated window based on the Helmholtz resonator principle was developed, capable of providing superior sound insulation compared to conventional windows without compromising ventilation airflow. To achieve this, conventional materials and construction systems were considered, along with feasible dimensions and opening parameters to ensure implementation within a typical architectural context. In the acoustic domain, the sound reduction index was analyzed through laboratory testing and mathematical methods. Regarding ventilation performance, computational simulations and wind tunnel measurements were conducted. The results obtained for the window showed a weighted sound reduction index R _w (C;Ctr) = 37 (−1; −4) dB when fully closed and 11 (−1; −1) dB when open. In terms of ventilation, the system enabled airflow, increasing wind velocity by up to 369% relative to the inlet condition.