The acoustic requirements on the market for axial fans become more and more demanding. Therefore, a fast and deep understanding of the aeroacoustics mechanisms in a product is necessary. Numerical methods can deliver these insights. This study shows that 3DS SIMULIA PowerFLOW, a transient compressible solver based on the Lattice Boltzmann Method (LBM), can identify and quantify flow noise in axial fans. An experiment run by University of Erlangen-Nuremberg/ TU Graz is used for validation. The simulation model consists of the axial fan and its shroud, placed in an anechoic chamber. Boundary and design operating conditions are applied to the geometrical model according to the experiment. The simulation results are compared to the experimental data. This paper demonstrates that simulations based on a LBM approach provide accurate and reliable results with computational effort that allows design iterations within an industrial context.