HASHEMI Z, FAHIM A, MONAZZAM MR. Investigation of the Effect of Non-Flat Surfaces on the Performance of Perforated Acoustic Absorber. Arch. Acoust. [Internet]. 2023 Apr. 21 [cited 2026 Jan. 17];48(2):171–181. Available from: https://acoustics.ippt.gov.pl/index.php/aa/article/view/3593