KHALAF YOUSIF, Yousif. A proposed new formula to determine the sound insulation of concrete walls. Anbar Journal of Engineering Science, [S. l.], v. 2, n. 2, p. 117–128, 2009. DOI: 10.37649/aengs.2009.14233. Disponível em: https://ajes.uoanbar.edu.iq/ajes/article/view/383. Acesso em: 7 jun. 2025.