Multichannel active noise control system without secondary path models using the simultaneous perturbation algorithm

This paper presents a novel multichannel active noise control (ANC) system without secondary path models. This ANC system uses a simultaneous perturbation algorithm as the updating algorithm and has an advantage that secondary path models (estimation of secondary paths) are not required, unlike the MEFX (multiple error filtered-X)-based ANC. This system can consequently control noise stably because there are not modeling errors that cause system instability. The computational complexity is also very small. Experimental results demonstrate that the proposed multi-channel ANC system can operate stably under the environment where the error microphones always move.