Abstract
In 3-dimensional sound field, it is difficult 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 microhpne moves during control. Experiments are also carried out under several conditions. From the results of the simulations and the experiments, the effectiveness of the proposed algorithm is shown.
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