摘要
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.
出处
《计量学报》
CSCD
北大核心
1997年第4期258-262,共5页
Acta Metrologica Sinica
基金
国家自然科学基金
关键词
声强测量
误差修正
残余声强
Sound intensity measurement
Error correction
Residual sound intensity