Page 40 - 《应用声学》2021年第5期

第 40 卷 第 5 期 Vol. 40, No. 5
2021 年 9 月 Journal of Applied Acoustics September, 2021

⋄ 研究报告 ⋄

振膜与音圈粘结间隙对高频截止的影响 ∗

王世伟 1,2† 陈 进 1,2 谢守华 1,2 陈维菲 1,2

(1 国光电器股份有限公司 广州 510800)
(2 广东省电声电子技术研发与应用企业重点实验室 广州 510800)
摘要：利用声学理论及 Comsol 仿真对电动式高音扬声器声压级高频进行分析，重点研究了高音振膜与音圈的
粘结状态对声压级高频截止的影响。根据实例分析，当音圈与振膜之间的粘结间隙被中心胶填充时，Klippel
测试的声压级高频提前截止。通过对中心胶粘结位置相关的类比线路图分析可知，扬声器高频截止频率主要
受振膜和中心胶的刚性影响，当中心胶粘结位置存在间隙时，因中心胶材料与骨架材料比模量的差异，C glue
变大，此时整体刚性变小，会使振动能量由音圈骨架传递到振膜材料时的传递速率受到削减，表现为高频截止
频率降低。Comsol 仿真分析表明，音圈骨架与振膜粘结位置存在间隙时，高频振动模态发生弯曲，影响振动能
量的传递，高频提前截止，与实例分析的结果一致。
关键词：Comsol；Klippel；粘结位间隙；比模量；高频截止
中图法分类号: TN643 文献标识码: A 文章编号: 1000-310X(2021)05-0684-07
DOI: 10.11684/j.issn.1000-310X.2021.05.005

Analysis on the influence of the gap between diaphragm and voice coil on
high frequency cutoff

WANG Shiwei 1,2 CHEN Jin 1,2 XIE Shouhua 1,2 CHEN Weifei 1,2

(1 GuoGuang Electric Company Limited, Guangzhou 510800, China)
(2 Guangdong Provincial Key Laboratory of Electroacoustic Electronic Technology R & D and Application,
Guangzhou 510800, China)

Abstract: The high frequency of sound pressure level (SPL) of electric tweeter was analyzed based on acoustic
theory. The influence of the bonding state between the tweeter diaphragm and the voice coil on the high
frequency cutoff of SPL was studied. The example analysis showed when there was a large gap between the
voice coil and the diaphragm filled by the center glue, the Klippel tested SPL high frequency cutoff. According
to the electromechanical and acoustic analysis of the position of the center glue, the cutoff frequency of the
loudspeaker was mainly affected by the rigidity of the diaphragm and the center glue. When there was a gap
in the central glue bonding position, due to the difference in the specific modulus between the central glue
and the bobbin material, the C glue became larger, and the overall rigidity became smaller. As a result, the
transfer rate of vibration energy from the voice coil bobbin to the diaphragm material would be reduced, high
frequency cutoff frequency was reduced. The simulation analysis of Comsol showed that when there was a gap
between the bond position of voice coil bobbin and diaphragm, the high frequency vibration mode would be
bent, which affected the transmission of vibration energy, and the high frequency was cut off in advance, which
was consistent with the results of example analysis.
Keywords: Comsol; Klippel; Bonding gap; Specific modulus; High-frequency cut-off
2020-11-17 收稿; 2021-04-07 定稿
科技部 2018“现代服务业共性关键技术研发及应用示范” 重点专项项目 (2018YFB1403800, 2018YFB1403803)
∗
作者简介: 王世伟 (1990– ), 男, 河南周口人, 硕士, 工程师, 研究方向: 扬声器应用领域的轻质夹层复合材料、振膜材料等。
† 通信作者 E-mail: 1321581483@qq.com