文章介绍了国外直接用图表设计磁体厚度、截面积及重量的新方法。同时对国内如何合理设计磁路系统提出了建议。电动式扬声器的设计,不外乎振动系统的设计及磁路系统的设计。 This paper introduces a new method to design the magnet thickness, cross-sectional area and weight directly by foreign countries. At the same time, how to design a reasonable magnetic circuit system in our country is put forward. Electric speaker design, nothing more than vibration system design and magnetic circuit system design.