Abstract
On active noise control (ANC) in 3-dimensional acoustic field, a control effect becomes worse when an evaluation point moves. Against this problem, we proposed a control algorithm using filter map. Validity of this algorithm was shown by simulations and experiments. To use the method, however, the adaptive filters must be accumulated in a controller so that the required memory becomes large. We use an IIR filter in order to reduction the memory in this paper. The filter is configured by tapped-delay-line structure and lattice structure. Moreover, an algorithm for updating the filter is proposed. The validity of the algorithm and the filter is shown in numerical simulations.
