| 内部激励源二自由度结构扬声器振动特性分析 |
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| 引用本文： | 刘云峰,沈勇,夏洁,章志亮.内部激励源二自由度结构扬声器振动特性分析[J].应用声学,2015,34(3):260-265. |
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| 作者姓名： | 刘云峰 沈勇 夏洁 章志亮 |
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| 作者单位： | 南京大学声学研究所,南京大学声学研究所,南京大学声学研究所,南京大学声学研究所 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 有别于多数基于简单振子结构的扬声器,针对一类内部激励源二自由度(IE2DOF)结构的扬声器,用类比线路图法建立集总参数模型,计算分析了这种结构的频率响应,同时计算了其固有共振频率和固有反共振频率。使用叠加法分析内部激励源对频响的影响。最后实际测量和理论计算吻合,进一步支持了理论模型,揭示了IE2DOF结构扬声器的振动特性。
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| 关 键 词： | IE2DOF 内部激励源 反共振 扬声器 |
| 收稿时间： | 2014/8/19 0:00:00 |
| 修稿时间： | 2015/4/20 0:00:00 |
Dynamic behavior of a kind of internal-excitation 2-degree-of-freedom structure loudspeaker |
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| LIU Yunfeng,SHEN Yong,XIA Jie and ZHANG Zhiliang.Dynamic behavior of a kind of internal-excitation 2-degree-of-freedom structure loudspeaker[J].Applied Acoustics,2015,34(3):260-265. |
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| Authors: | LIU Yunfeng SHEN Yong XIA Jie and ZHANG Zhiliang |
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| Institution: | Key Laboratory of Modern Acoustics,MOE,and Institute of Acoustics,Nanjing University,Key Laboratory of Modern Acoustics,MOE,and Institute of Acoustics,Nanjing University,Key Laboratory of Modern Acoustics,MOE,and Institute of Acoustics,Nanjing University,Key Laboratory of Modern Acoustics,MOE,and Institute of Acoustics,Nanjing University |
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| Abstract: | For a kind of internal-excitation 2-degree-of-freedom (IE2DOF) structure loudspeaker, which is different from the most common simple oscillator structure, analogous circuit method is used to build a lumped parameter model. Its frequency response is calculated and analyzed. The natural resonant and anti-resonant frequencies are also given. Superposition method is used to analyze the influence of the internal excitation pattern. Measuring result supports the calculation very well. This research reveals the dynamic behavior of such kind of IE2DOF structural loudspeakers. |
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| Keywords: | IE2DOF internal excitation anti-resonance loudspeaker |
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