Prasetiyo I, Sarwono J, Sihar I. Study on inhomogenous perforation thick micro-perforated panel sound absorbers. J. Mech. Eng. Sci. [Internet]. 2016 Dec. 31 [cited 2024 Jul. 22];10(3):2350-62. Available from: https://journal.ump.edu.my/jmes/article/view/7838