736 床衝撃音のアクティブ遮音パネルシステム : 簡易モデルにおける音響放射パワーの解析

概要

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This report describes an analysis of acoustic power radiated from the insulation panel system for reducing floor impact noise. The systems are comprised of actively controlled modular panels of light weight, which wholly cover the surface of concrete slab structure in the ceiling, and in each of which the mechanical vibration is controlled independently with moving coil actuators. In this report, the acoustic power is evaluated by the work done by normal velocity in the vibrating plate combining with the acoustic pressure expressed by the Rayleigh's formula. The analysis suggests the effectiveness of feed-back control system utilizing the vibration mode signals of the insulation panel. Among the bivration modes the most important is the one whose shape funtion is even about the center axes of the plate and results in the monopole sound radiation.
社団法人日本機械学会の論文
2006-08-06