M. OHTA and H. IWASHIGE, “Statistical sound evaluation for the improvement of sound insulation systems”, Arch. Acoust., vol. 13, no. 3-4, pp. 281–303, Jul. 2015, Accessed: Apr. 25, 2025. [Online]. Available: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3075