Research on virtual position noise control technology based on secondary error filter control algorithm

To the traditional ANC system, the noise reduction region is strictly limited around the error sensors within a certain range, but in terms of drivers, it is difficult to be installed in fixed error sensors around the human ear. In this paper, the idea of the virtual location of noise control will be introduced, and combined with the second error filtering algorithm. This method can effectively reduce the noise level in a remote location by adjusting the gain coefficient and the virtual noise location, and according to actual requirement, the amount of attenuation of noise in different frequency domain can be controlled.