A real-time 3-D acoustic noise attenuation system

An implicit self-tuning controller derived from Generalized Minimum Variance control law is proposed for active noise attenuation ANA system. Unlike the concurrent ANA controllers, it has the ability to estimate the main acoustic, feedback and error path dynamics simultaneously. It is also interesting to point out that existing available ANA controllers are found to be the special cases of this controller, but only associated with different weighting functions. In this paper, both parameter estimation and controller algorithms are outlined. To justify its effectiveness in noise control, experimental results obtained from a real-time 3-D configuration are included. © 1993.