本文介绍一种用于传声器校准的双介质静电激发校准装置,它的激发器系列采用了高分子双层介质结构,从而解决了激励力的提高与电击穿的矛盾,克服了校准中的放电击穿危险。激发器栅板为梯形断面,使谐振频率提高、结构的动力特性得到改善,并降低了声反射引入的误差。本装置产生的声压级大于97dB(1英寸)和102dB(1/2英寸),40kHz内的频响偏差小于±0.3dB,击穿电压大于1600V,极间绝缘大于10~(14)Ω。 This article describes a dual-media electrostatic microphone calibration calibration excitation device, which uses a series of dual-layer excitation medium structure of the dielectric, thus addressing the incentive to improve the conflict with the electrical breakdown, to overcome the calibration discharge Breakthrough danger. The exciter grid has a trapezoidal cross-section, which increases the resonant frequency, improves the dynamic characteristics of the structure, and reduces the error introduced by acoustic reflection. The device produces sound pressure levels greater than 97dB (1 inch) and 102dB (1/2 inch) with a frequency response deviation of less than ± 0.3dB at 40kHz, a breakdown voltage greater than 1600V and an interelectrode insulation of greater than 10 ~ (14) Ω.