A. TROCHIDIS and G. PAPANIKOLAOU, “The use of Helmholtz resonators and panel absorbers in the design of duct silencers”, Arch. Acoust., vol. 18, no. 3, pp. 435–446, May 2014, Accessed: Jan. 17, 2026. [Online]. Available: https://acoustics.ippt.gov.pl/index.php/aa/article/view/1154