二次経路における遅延推定機構を持つ適応アルゴリズム

概要

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In recent years, traffic noise gives rise to public discussion with the development of transport facilities. An exhaust noise of engine which is one of the traffic noise is classified into periodic one. The most power of a periodic noise to be controlled is concentrated on certain harmonic components, so that it is effective to control only these harmonic components. When active noise control(ANC)systems are actually implemented, they need a model of characteristics of secondary path. The difference between the actual characteristics of secondary path and its model is called modeling error. It is known that a degree of the modeling error affects the performance of ANC system directly. In this paper, a new adaptive algorithm to control periodic noise is proposed. The proposed algorithm is robust against an observation noise and its computational load is smaller than that of conventional adaptive algorithm. Also its extended algorithm which has on-line estimate function of a delay component of secondary path is proposed. The performance of these algorithms is evaluated by computer simulations, model experiment using a duct and an experiment using exhaust noise of diesel engine.
社団法人日本音響学会の論文