TY  - CONF
T1  - RENDERING OF AN ACOUSTIC BEAM THROUGH AN ARRAY OF LOUDSPEAKERS
A1  - Antonacci, Fabio
A1  - Calatroni, Alberto
A1  - Canclini, Antonio
A1  - Galbiati, Andrea
A1  - Sarti, Augusto
A1  - Tubaro, Stefano
TI  - Proc. of the 12th Int. Conference on Digital Audio Effects (DAFx-09)
Y1  - 2009
N2  - This paper addresses the problem of the rendering of a virtual source through loudspeaker arrays. The orientation of the virtual source and its aperture determine its radial beampattern. The methodology we present here imposes that the wavefield in a predetermined listening area best approximates the desired wavefield in the Least Squares sense. With respect to the traditional techniques the number of constraints is much higher than the number of loudspeakers. As a consequence, the loudspeaker coefficient vector is the solution of an over-determined equation system. Moreover this system may be ill-conditioned. In order to solve these issues, we resort to a Least Squares inversion combined with a Singular Value Decomposition to attenuate the problem of illconditioning. Some experimental results show the feasibility and
the issues of this methodology.
ER  -