How does the shape of the grille (so-called grill) in a PC case affect the noise level and ventilation performance?

The article discusses the impact of grill patterns on fan performance and noise generation. The authors conducted a series of tests to investigate how various hole arrangements in grills affect airflow. Specifically, they confronted the issue of whether more open grill patterns improve the overall efficiency of fans, crucial for cooling systems in computers. During the experiments, they documented noise levels and airflow in different configurations. The results of this research could be a boon for engineers designing cooling systems, allowing them to better balance performance with acoustics. The article concludes with a summary that highlights the importance of testing different patterns in practical applications of fan systems and their effects on users of such systems.