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 2025 Apr. 26];48(2):171–181. Available from: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3593