KIM, M.-J.; RIM, C.-G.; WON, K.-S. Broadening Low-Frequency Band Gap of Double-Panel Structure Using Locally Resonant Sonic Crystal Comprised of Slot-Type Helmholtz Resonators. Arch. Acoust. 2021, 46 (2), 335–340. https://doi.org/10.24425/aoa.2021.136587.