Fixed gain multichannel active noise control with disturbance dependent objectives and iterative solution

This paper presents a solution method for fixed multichannel frequency domain feedforward controller, which is optimized different sound field disturbances, each corresponding to control objective. A controller determined on the basis of identical objectives disturbances can be solved efficiently by using inverse two relatively small matrices, Hermitian square secondary path and cross-spectral density matrix all combinations between reference signals. In contrast, dependence disturbance objective results in large matrix, may not fit memory computer. To design systems with numbers sensors sources, an iterative based conjugate gradient technique used. preconditioner disturbance-independent proposed. improves convergence rate some applications. numerical example given active acoustic inside room dependent weighting function applied cost function. It shown that finds noise problem.