3D BEM-accelerated solvers for linear acoustics and elastodynamics (main programmer, so far 200 000 lines of Fortran 90). The 3-D acoustic and elastodynamic equations are solved with the boundary element method accelerated by the multi-level fast multipole method or H-matrix based fast solvers. The fundamental solutions for the infinite space are used in this implementation. A boundary element-boundary element coupling strategy is also implemented so multi-region problems (strata inside a valley for example) can be solved. An introductive documentation is available at the end of my PhD dissertation. Registered with the APP under number. IDDN.FR.001.250012.000.S.P.2015.000.31235