BORGES MENDES, C.O. and DE ARAÚJO NUNES, M.A. 2021. Numerical Methodology to Obtain the Sound Absorption of Materials by Inserting the Acoustic Impedance. Archives of Acoustics. 46, 4 (Dec. 2021), 649–656. DOI:https://doi.org/10.24425/aoa.2021.139641.