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在声学结构不对称时,压差送话器的各种特性都将遭到破坏。本文首先推导了压差送话器相对灵敏度的表达式,编制出计算轴向频响特性和指向特性的FOR TRAN程序。然后,在声学结构对称时和各种不对称的情况下,计算出压差送话器的各种特性,通过对计算结果的初步分析,得出一些有用的结论。
In the asymmetric acoustic structure, the various characteristics of the differential microphone will be destroyed. This paper first derives the expression of the relative sensitivity of the differential pressure transmitter and compiles the FOR TRAN program for calculating the axial frequency response and directional characteristics. Then, when the acoustic structure is symmetrical and various asymmetries, various characteristics of the differential pressure transmitter are calculated. Based on the preliminary analysis of the calculation results, some useful conclusions are drawn.