分散制御による多点加振を用いた音響空間の固有振動計測

（遮蔽物が音響空間の伝達特性に及ぼす影響）

抄録

Measurement of natural vibration of acoustic space is effective for noise reduction in the cabin room of vehicle (e.g. auto-mobile, railroad car and so on). In general, multi-point excitation is useful to measure natural vibration of threedimensional acoustic space with high damping on boundary surface. However, multi-point excitation needs adjustment of amplitude and phase for each actuator. Thus, multi-point excitation is difficult to implement. In this study, the measurement technique of natural vibrations of acoustic space by multi-point excitation using decentralized control with local feedback control is used. Local feedback control generates force in the direction of motion, which had been presented by authors. In this paper, the natural vibration of acoustic space with a shielding plate was measured.