音響パワーを最小とする能動騒音制御の研究 : 大型開口部放射音を対象とした音圧最小制御法の提案(機械力学,計測,自動制御)

抄録

This paper considers the minimization of total acoustic power radiated from a large duct opening. The sound field in the large duct opening is not always represented by a harmonic modal function. Therefore, the authors consider that the complex pressure amplitude at any position in duct opening can be regarded as random function, and propose a method employing an active noise control in order to minimize the total acoustic power by designing the duct opening, leading to change the complex pressure amnlitude in the duct opening. The power reducing performance was confirmed by the basis of theoretical estimation.