609 クラスタ制御による二重壁構造物から発生する放射音の抑制

抄録

This paper considers the active control method to reduce harmonic sound transmission through a double-leaf partition radiated from a vibration symmetric structure into a free field using error signals derived from structural sensing. The double-leaf partition consists of a pair of small plates separated by a air gap. It has been found that taking advantage of the symmetric properties of structural modal functions, "radiation cluster", which is an orthogonal contributor with respect to acoustic fields, can be defined. The philosophy of radiation cluster control by active means will be applied to a double-leaf partition.