20.500.12556/RUL-182866 Sound absorption performance of biobased Miura-ori origami panel absorbers made from impermeable paper membrane This study examines the potential of sustainable, biobased paper-based structures as panel/membrane sound absorbers. Although intact paper is naturally impermeable and a poor sound absorber, transforming it into complex three-dimensional origami geometries, specifically the Miura-ori pattern, could produce effective panel/membrane absorbers. Three distinct Miura-ori samples (A, B, and C) were fabricated with increasing geometric complexity, ranging from a simple triangular prism to a complex labyrinthine waveguide. The random incidence sound absorption coefficients of these samples were measured in a validated small-scale reverberation room. The underlying absorption mechanisms were further investigated through modal analysis and non-contact vibration velocity mea- surements. The results indicate that increased geometric complexity enhances acoustic performance. Sample C, the most complex structure, demonstrated the most consistent broadband absorption. The analysis confirmed a significant positive correlation between acoustic pressure modes, surface vibration velocity, and sound absorption peaks, indicating that acoustic energy dissipation is driven by the vibrational response of the paper mem- brane coupled with resonant modes in the air gap. This research demonstrates that tunable origami folding techniques using intact paper can be used to design lightweight acoustic treatments for diffuse sound fields in the mid-frequency range. sound absorption random incidence sound absorption coefficient biobased material origami-based lightweight panel Miura-ori structure zvočna absorpcija koeficient zvočne absorpcije difuzno zvočno polje biološki material lahek panel na osnovi origamija vzorec Miura-ori true false true Angleški jezik Slovenski jezik Članek v reviji 2026-05-26 11:23:42 2026-05-26 11:23:52 2026-05-27 04:40:05 0000-00-00 00:00:00 2026 0 0 19 str. issue 11, art. 1287 Vol. 18 2026 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 0000-00-00 534.833.53 2073-4360 10.3390/polym18111287 279358723 RAZ_Curovic_Luka_2026.pdf RAZ_Curovic_Luka_2026.pdf 1 BA5C5CF188A5C4B70D7C1055D1195277 0f5eb5800c48c18b69b4fd79cb7d5cf541706880091317f70f2a677cf51e27ba d5979610-58e4-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=234489 https://www.mdpi.com/2073-4360/18/11/1287 1 487977dd-58e4-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=234488 Fakulteta za strojništvo 0 0 0