| 蒋钰,陆晓,温周斌.一种平衡衔铁受话器数值仿真分析方法[J].声学技术,2022,41(5):670~677 |
| 一种平衡衔铁受话器数值仿真分析方法 |
| A numerical simulation method for balanced armature receiver |
| 投稿时间：2021-03-17 修订日期：2021-04-12 |
| DOI：10.16300/j.cnki.1000-3630.2022.05.006 |
| 中文关键词: 平衡衔铁受话器 数值仿真方法 声压级 平衡衔铁 集总参数模型 |
| 英文关键词: balanced armature receiver(BAR) numerical simulation method sound pressure lever balanced armature lumped parameter model |
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| 中文摘要: |
| 平衡衔铁受话器(Balanced Armature Receiver, BAR)是一种动铁式扬声器，具有尺寸小、电声转换效率高和灵敏度高等特点。利用平衡衔铁受话器的集总参数模型分析指出平衡衔铁运动会影响反电动势和磁场力，提出一种基于COMSOL Multiphysics的平衡衔铁受话器声压级和阻抗的仿真分析方法。首先对平衡衔铁受话器的磁场特性进行稳态分析，计算得到可随平衡衔铁运动变化的驱动力和反电动势；再对电磁场、结构和声场耦合模型进行频域分析，最终计算得到平衡衔铁受话器的声压级和阻抗。仿真分析结果和测量结果两者基本吻合。 |
| 英文摘要: |
| The balanced armature receiver (BAR) has the characteristics of small size, high electro-acoustic transform efficiency and high sensitivity. Based on the lumped parameter model, this paper point out that the movement of balanced armature will affect the back EMF and magnetic force and proposes a numerical simulation method for BAR to obtain its sound pressure level and impedance based on COMSOL Multiphysics. Firstly, the steady state analysis of the magnetic field characteristics of BAR is carried out, and the driving force and back-EMF, which can vary with the movement of the balance armature, are calculated. Then, the coupling models of magnetic, mechanical and acoustic fields are analyzed in frequency domain, and finally, the sound pressure level and impedance are calculated. comparison between simulated and measured results shows that they are basically consistent. |
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