Reproduction of sound source directivity for future audio applications

The paper describes different methods devoted to the reproduction of sound source directivity. Although being dedicated to different application domains, they are based on similar physical modelling and rely on array technology driven by signal processing. In the first approach, a 3D array of transducers laid out on the facets of a polyhedron is controlled in order to radiate sound according to the simulated source. A dual approach, where the transducer array is now distributed around the audience uses WFS in order to create a sound field similar to the one that would have been generated by the virtual source. These two approaches are compared, in their respective application domains, in terms of reproduction accuracy of the direct sound and associated room effect, joined recording technique, practical implementation and flexibility.