A. PILCH and T. KAMISIŃSKI, “The Effect of Geometrical and Material Modification of Sound Diffusers on Their Acoustic Parameters”, Arch. Acoust., vol. 36, no. 4, pp. 955–966, Oct. 2013, Accessed: Jan. 18, 2026. [Online]. Available: https://acoustics.ippt.gov.pl/index.php/aa/article/view/157