Stable Virtual Sensing Algorithm for Active Noise Control with Sequential Online Modeling of the Auxiliary Filter and the Secondary Path

抄録

This paper proposes stable virtual sensing algorithm for active noise control with sequential online modeling of the auxiliary filter and the secondary path. The two online modelings prevents system divergence and maintain high noise reduction when there is a secondary path change such as microphone relocation. The online modeling of the secondary path adjusts mismatch in the noise-control filter. The online modeling of the auxiliary filter compensates for the mismatch therein caused by the secondary path change. A simulation result with recorded signals shows that the proposed method maintains a noise reduction of 22 dB even when a secondary-path change takes place.