驻波声场下面对面式声强探头误差分析

摘要

According to the structural characteristics of the face-to-face configuration, based on the microphone equivalent acoustic models, the phase mismatching characteristic of sound intensity probe is analyzed. Then the causes of error and the distribution curves of the face to face sound intensity probe under a standing wave field are discussed in detail. Tiny standing wave field caused by support brackets will affect the accuracy of phase calibration. An improved method is proposed. Finally,the analysis models and conclusions are verified by experimental results.%针对面对面式声强探头的结构特点,基于传声器等效声学模型,对声强探头相位失配误差进行了讨论,深入分析了驻波声场下面对面式声强探头测量误差产生的原因和误差分布曲线,指出面对面式声强探头支架反射产生的微弱驻波声场会对双传声器的相位校准精度产生影响,提出了改进的校准方法.所分析模型和结论的有效性最终通过试验进行了验证.