Impact of design variations of micro-perforated panels on psychoacoustic metrics of transmitted sound Free

Recent work reveals that sound travelling through metamaterials will lead to changes in sound quality metrics [L. De Ryck et al, Proceedings of ISMA and USD, pp. 1147-1162 (2018)]. This study investigates the relationship between the intrinsic physical properties of periodic micro-perforated panels (MPP) and the resulting psychoacoustic metrics (loudness, sharpness, and speech intelligibility index) in 1D sound transmission conditions. A Sobol global sensitivity analysis was performed to quantify the impact of variations in MPP parameters—panel thickness, perforation rate, hole diameter, and air cavity depth between panels—on these metrics [I.M. Sobol, MATCOM, Vol. 55, pp. 271-280 (2001)]. The analysis was conducted using both broadband and narrowband noise stimuli. The data trends suggest that the psychoacoustic effects of MPP acoustic treatments exhibit a non-trivial dependence on specific parameters of the panel setup. This also provides a framework towards material design, where desired psychoacoustic metrics guide the manufacturing of metamaterials to achieve specific sound quality targets.