Influence of Media Loss on Semi-Passive Piezoelectric Sound Insulation

摘要：

　　Piezoelectric material shunted with negative capacitance can be used to insulate sound theoretically.But sound insulation of the system is limited by many factors.The dielectric and mechanical loss of the piezoelectric system deteriorate seriously the ability at some frequencies.According to the ideal electric elements formulas,the capacitance has imaginary part because of the loss.It has important influence on sound insulation ability.If a series resistance is introduced into the shunting circuit to form the imaginary part to compensate the loss,it is dependent on frequency.Sound insulation would be increased only in narrow band,and at some frequencies the system with the shunting circuit even becomes unstable.

关键词： Piezoelectric Negative impedance Sound insulation Media loss

作者: Wenqun Zhang Xinyue Wu Wen Cao

作者单位: Department of Mechanical Engineering, NUE, Wuhan, 430033, China Wuhan Environmental Protection Science Research Institute, Hubei, 430033, China

会议类型: 国际会议

会议名称: the 2011 International Conference on Frontiers of Manufacturing Science and Measuring Technology (第一届制造科学与检测技术国际会议(ICFMM2011))

会议地点: 重庆

会议语种:英文

页码: 1181-1184

在线出版日期: 2011-06-23（万方平台首次上网日期，不代表论文的发表时间）