Signal-to-interference-plus-noise ratio based optimization for sound zone control

Sound zone control is posed as an optimization problem where finite impulse response filters are jointly optimized for low transmit power, while maintaining a sufficiently high signal-to-interference-plus-noise ratio (SINR) in all zones. This statement particular allows the consideration of sound under additional influence external noise, which rarely taken into account and indeed necessitates alternative statement. In addition, spectral characteristics audio signals account, both power minimization computing SINR. The shown to be solved optimally by semidefinite relaxation, but computational cost high. An alternate method proposed, inspired duality between receive beamforming commonly exploited digital communications. A virtual derived, it have same optimal solution original problem. efficiently through fixed point iteration algorithm. two proposed methods compared against acoustic contrast controlin simulated reverberant environment, that require less produce similar SINRs.