基于相关传声器比较法的传声器低频校准  

Low Frequency Microphone Calibration Based on the Related Microphones Method

作　　者：陈红江 何龙标[2] 

机构地区：[1]湖南省计量检测研究院,湖南长沙410014 [2]中国计量科学研究院,北京100013

出　　处：《计量学报》2013年第4期383-386,共4页Acta Metrologica Sinica

摘　　要：针对低频声校准，阐述了一种传声器低频（0．1～250Hz）校准的新方法。通过特制低频参考传声器组的频响曲线对比得到参考传声器相对于251．2Hz的频率响应值，然后再通过比较法得到被测传声器的频率响应值，从而实现了传声器低频校准，通过测量实验以及误差分析验证了所提出模型的有效性和实用性。A new method for frequency response calibration of measured microphones over the range of 0. 1 to 250 Hz is described. If required, these frequency response calibrations can be combined with absolute sensitivity calibrations at 251.2 Hz. They might either be performed by comparison with another microphone or by using a calibrated sound source. The effectiveness and practicality of the method are verified by the measurement experiments and datum analysis.

关 键 词：计量学 参考传声器 低频校准 耦合腔互易法 均压孔 频响曲线 

分 类 号：TB95[一般工业技术—计量学]