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关于方口径多模喇叭,已有很多文章进行过研究,特别是文章[1]进行过详细的分析、计算。本文与从前的一些分析文章不同之处在于考虑喇叭中传输的各种模式的波阻抗及场强归一化系数的不同,得出同时包含电场边界条件与磁场边界条件的平均模转换系数,同时,在具体计算模转换系数时,用菲涅尔函数代替数值积分,在精度上与数值积分相同,但可显著提高计算速度。这样,在喇叭的设计中,综合喇叭口径模比就很方便。最后,导出考虑各截面的反射时的代数方程组。
On the square caliber multimode speaker, there are many articles have been studied, especially the article [1] conducted a detailed analysis and calculation. The difference between this paper and some previous analyzes is that the wave impedance and the field normalization coefficients of the various modes transmitted in the speaker are considered. The average modulo transfer coefficient that contains both the boundary conditions of the electric field and the magnetic field is obtained. Meanwhile, , In the specific calculation of modulus conversion coefficient, the Fresnel function instead of numerical integration, the same precision with numerical integration, but can significantly improve the calculation speed. In this way, in the speaker design, integrated speaker aperture ratio is very convenient. Finally, we derive algebraic equations that consider the reflection of each section.