Numerical Modeling using the Nonlinear Progressive Wave
Equation (NPE)
Outdoor
Sound Propagation
| The NPE model is adapted here to simulate sound propagation in the atmosphere. The free surface and the sediment layer of the ocean waveguide are respectively replaced by a sponge and a rigid bottom (Fig. 6). The thermoviscous absorption term of the NPE is added as following |
Fig. 6 : Schematic representation of the NPE moving frame for outdoor propagation problems