TROCHIDIS, A., and G. PAPANIKOLAOU. “The Use of Helmholtz Resonators and Panel Absorbers in the Design of Duct Silencers”. Archives of Acoustics 18, no. 3 (May 1, 2014): 435–446. Accessed June 21, 2025. https://acoustics.ippt.pan.pl/index.php/aa/article/view/1154.