Three vibro-acoustic analysis using Finite Element Method (FEM) is presented. The first analysis is a three-dimensional (3D), interior acoustic, vehicle cabin model, where the modal density and natural frequencies are discussed. The second example is a bi-dimensional (2D) fluid-structure model of the vehicle cabin. In this analysis the main results of the coupled free vibration analysis are presented and discussed. The third example illustrates the use of DtN (Dirichlet-to-Neumann) Map, for exterior acoustic analysis. The DtN Kernel for two dimension problem is presented, and the finite element form is derived. A simple bi-dimensional problem of acoustic radiation from the propulsion system is obtainned. © 1998 Society of Automotive Engineers, Inc. Everstine, G.C., Finite Element Formulations of Structural Acoustics Problems (1997) Computers & Structures, 65 (3), pp. 307-321Nunes, A., Pavanello, R., (1997), pp. 67-73. , Estudo do Compartimento de Passageiros de Veículos. Anais do IV Simpósio Brasileiro de Acústica Veicular, SIBRAV, São Paulo, SP, Brasil. AugustGalli, L.A.F., (1995), Estudo do Comportamento Dinâmico de Sistemas Acoplados Fluido Estrutura Utilizando-se uma Formulação Simétrica em Potenciais de Velocidade. Msc. Thesis at State University of Campinas (DMC-FEM), São PauloZienkiewicz, O.C., Newton, D.E., Coupled Vibrations of a Structure Submerged in Compressible Fluid (1969) Proceedings of International Symposium on Finite Element Techniques, pp. 360-379. , Stuttgard, May 1-5Keller, J.B., Givoli, D., Exact Non-Reflecting Boundary Conditions (1989) Journal of Computational Physics, 82, pp. 172-192Zienkiewicz, O.C., Taylor, R.L., (1991) The Finite Element Method, , Berkshire: McGraw-HillZavala, P.A.G., (1998), Análise Vibro-Acustica de Interiores e Exteriores Utilizando um a Formulação DtN e o Método dos Elementos Finitos. Msc. Thesis at State University of Campinas (DMC-FEM), São Paulo, (to be presented in)Harari, I., Hughes, T.J.R., Galerkin/Least Squares Finite Element Methods for the Reduced Wave Equation with Non-Reflecting Boundary Conditions in Unbounded Domains (1992) Computer Methods in Applied Mechanics and Engineering, 98, pp. 411-454