文章摘要
王坤,沈勇,章志亮,黄杰,冯雪磊.微型扬声器振动系统阻尼频率特性研究[J].,2016,35(1):90-94
微型扬声器振动系统阻尼频率特性研究
A research of frequency dependence of damping in micro-speaker suspension
投稿时间:2015-06-04  修订日期:2015-12-28
中文摘要:
      受材料黏弹性的影响,微型扬声器振动系统的力阻与频率有关。通过理论推导建立了力阻与频率之间的模型,得到了微型扬声器振动系统力阻的计算公式,利用激光测振法测量得到的微型扬声器阻抗曲线和位移曲线可以方便地得到微型扬声器振动系统力阻频率响应,表明了其随频率增加而减小的频率特性。实验表明,采用该频率相关力阻模型计算阻抗曲线、位移曲线和频率响应曲线,与测量值吻合很好,明显好于传统频率非相关力阻模型所得曲线。
英文摘要:
      Under the viscoelastic effect of the material in micro-speaker suspension, the damping of the micro-speaker suspension is frequency-dependent. According to the theoretical derivation, the suspension damping in micro-speaker can be calculated and the formula of damping can be obtained from the model. According to the curves including the impedance and the displacement measured by the laser, the damping curve of the micro-speaker suspension can be derived conveniently which shows the frequency-dependent characteristic of damping that decreases with the increase of frequency instead of a constant value. In the meantime, the experiment shows the data coincidence between the measured and calculated curves which employ the frequency-dependent model of damping in micro-speaker suspension including the impedance, displacement and the frequency response is higher than the frequency-independent model.
DOI:10.11684/j.issn.1000-310X.2016.01.013
中文关键词: 微型扬声器,振动系统力阻,频率特性
英文关键词: Micro-speaker, Suspension  damping,frequency-dependent  characteristic
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)
作者单位E-mail
王坤 南京大学声学研究所 近代声学教育部重点实验室 南京 210093 mg1322083@163.com 
沈勇 南京大学声学研究所 近代声学教育部重点实验室 南京 210093 yshen@nju.edu.cn 
章志亮 南京大学声学研究所 近代声学教育部重点实验室 南京 210093 zhiliangzhang2009@163.com 
黄杰 南京大学声学研究所 近代声学教育部重点实验室 南京 210093 hjacoustics@163.com 
冯雪磊 南京大学声学研究所 近代声学教育部重点实验室 南京 210093 xlfeng@hotmail.com 
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