声强测量中系统误差修正的若干问题研究

On the Correction of Systematic Error in Sound Intensity Measurement

本文对用残余声强法修正声强测量的系统误差进行了理论分析，推导了它的误差表达式，给出了该误差的二元分布图。结果表明，用残余声强法修正声强测量的系统误差是有偏的，并会导致测量的声强在某些频率上严重的欠估计。同时，也指出了声强修正公式中一个常见的错误。

To compensate the systematic error in sound intensity measurement by using the residual intensity correction method is analysed theoretically. The error expression of the correction method is derived. A series of error distribution maps are given. The results show that the systematic error in sound intensity measurement corrected by the residual intensity method is a bias error, and the correction method may lead to underestimate seriously on sound intensity at some frequency components. Additionally, a mistake in the sound intensity correction formula is pointed out.