114 圧電材料を用いた騒音制御パネルによる変圧器騒音対策(騒音・振動対策の最前線(1),騒音・振動評価・改善技術)

概要

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To reduce the noise radiated from the transformer, it is necessary to set up the sound insulating walls or for the transformer to be placed indoor, but these countermeasures are high-cost. Because the panels of transformer are very thick, it is difficult to control the vibration of the panels. As one measure of lightweight and low-cost, we propose a way to dissipate the noise energy transmitted through panels of transformer by installing noise control panels equipped with piezo-ceramic loudspeakers which consist of piezo-ceramic and thin iron plates. By fixing the noise control panels on the panel of transformer directly, the noise transmitted through the panel of transformer reduced by 7dB at 200Hz.
社団法人日本機械学会の論文
2007-07-18