声强传声器对相位差校准方法研究  

Research on Calibrations of Phase Mismatch in Sound Intensity Microphone Pairs

作　　者：周长华 罗奔毅 戴斌 ZHOU Changhua;LUO Benyi;DAI Bin(Guangzhou Institute of Measurement and Testing Technology,Guangzhou 510063,China;Spectris Instrumentation and Systems Shanghai Ltd.,Guangzhou 510620,China)

机构地区：[1]广州计量检测技术研究院,广州510663 [2]上海思百吉仪器系统有限公司,广州510620

出　　处：《计量科学与技术》2023年第11期85-90,共6页Metrology Science and Technology

基　　金：国家市场监督管理总局科技计划项目(2022MK147);广州市NQI-质量安全科技协同创新中心项目(2023B04J0407)。

摘　　要：声强是声学中常用的物理量,具有方向性。声强测量在声功率测定及主噪声源识别方面有其独特的优点,是声学领域中一种重要的测量技术。目前声强测量方法最常用的是双传声器法,双传声器法采用近似算法,因此存在固有的系统误差和测量频率范围的限制。此外,声强探头中双传声器不匹配引起的相位差也是影响声强测量误差的重要因素。如何准确测量双传声器之间的相位差,便成了双传声器配对的重要任务之一。研究了耦合腔法和静电激励器法两种方法,准确测量双传声器的相位特性,实现了传声器间相位差的规范化量化测量。Sound intensity,an essential acoustical parameter indicating the direction of sound energy flow,is increasingly significant in acoustics,especially for sound power measurement and noise source identification.The two-microphone method is the prevalent technique for sound intensity measurement.This method,being approximate,inherently contains systematic errors and limits the frequency range for accurate measurement.Additionally,phase mismatch in microphone pairs is a critical factor affecting measurement accuracy.This paper focuses on accurately measuring the phase mismatch between two microphones,a key aspect of microphone pairing.Utilizing the coupler comparison method and electrostatic actuator method,the study achieves normalized and quantitative measurement of microphone phase mismatch.The research contributes to refining microphone pairing accuracy and enhancing sound intensity measurement reliability.

关 键 词：计量学 声强 声强传声器对 P-P探头 耦合腔法 静电激励器法 相位差 

分 类 号：TB95[一般工业技术—计量学]