Abstract
In 3-dimensional sound field, it is di cult to control noise in whole area. Instead of whole area control, the controlled area can be followed to people in that field by new approach proposed in this paper. In the proposed algorithm, FTF algorithm that has fast converging property is introduced to a direct adaptive algorithm which does not need an error path characteristic. A numerical simulation is carried out with a sound field that the error path changes during control. From the results of the simulations, the e ectiveness of the proposed algorithm is shown.
