WSEAS Transactions on Acoustics and Music Print ISSN: 1109-9577, E-ISSN: Volume 14, 2027 Evrim Guven, Timur Canel, "Modeling the Impedance of Sound Waves Passing through a Roughness Pipe using COMSOL Multiphysics", WSEAS Transactions on Acoustics and Music, vol. 14, pp. 1-8, 2027 Journal Contents