Broadband directive sources modeling for acoustic discrete‐time domain methods

The use of sources with complex directivities in discrete‐time domain methods, such as the finite‐difference time‐domain method or the digital waveguide mesh, is a recently open topic. However, so far, the provided solutions work for discrete frequencies or frequency‐independent sources. Both solutions are useful for very particular cases and in most cases, far from real sources. This paper provides an extension in the use of a monopole source combination for broadband directive sources in discrete‐time domain simulations. This method results very effective for frequency‐independent and dependent sources, even in cases where the directivity diagrams have considerable lobules. Finally, this method will be tested through several examples.