前置放大器输入阻抗对声强探头相位特性的影响  

Influences of Preamplifier Input Impedance on the Phase Characteristics of Sound Intensity Probe

作　　者：王再平[1] 陈心昭[1] 

机构地区：[1]合肥工业大学,合肥230009

出　　处：《计量学报》1993年第4期313-317,共5页Acta Metrologica Sinica

基　　金：国家教委博士点基金

摘　　要：研究了前置放大器输入阻抗对声强探头相位特性的影响。在理论分析的基础上,通过计算和实验揭示出前置放大器输入阻抗和声强探头相位不匹配误差之间的关系,并得出一些有益的结论。This paper deals with the influence of preamplifier input impedanceon the phase characteristics of sound intensity probe. Based on the theoretical analysis, the relationship between the preamplifier input impedance and the phase mismatch errors of sound intensity probe has been acquired by computation and experiment. Some helpful conclusions are described.

关 键 词：前置放大器 输入 阻抗 相位 误差 

分 类 号：TN722.71[电子电信—电路与系统]