Abstract
On active noise control in 3-dimensional acoustic field, a control effect becomes worse when an evaluating point moves. Against this problem, authors proposed control by Filter-Map. This algorithm makes map by storing filters and updates the map. In this paper, the way to update the map is investigated. For appropriately updating, map reliability is calculated and the map is updated by using the map reliability. The validity of this method is confirmed by numerical simulation using acoustic characteristics in an anechoic chamber.
