摘要
矢量水听器由声压水听器和质点振速水听器复合而成,可以空间共点同步测量声压和质点振速,并由此得到空间一点处的声能流。本文证明在各向同性噪声场中声能流是最大似然比检测量,声能流方向是声源方位的最大似然估计;讨论声能流检测器的增益以及方位估计DOA(Direction of Arrival)的克拉美罗界CRB(Cramer—Rao Bound)。给出了计算机的仿真结果和浅海试验的结果。
A vector hydrophone consists of pressure hydrophone and particle velocity hydrophone, which can co-locately in space and simultaneously in time measures pressure and particle velocity, and obtains acoustic energy flux at a point. In the paper it is shown that in isotropical noise field acoustic energy flux is maximum likelihood ratio detector, its direction is maximum likelihood estimation of source direction. The gain of acoustic energy flux detector and Cramer-Rao Bound (CRB) of Direction of Arrival (DOA) estimation are discussed, and the results of computer simulations and the shallow sea trial are given.
出处
《声学学报》
EI
CSCD
北大核心
2003年第1期66-72,共7页
Acta Acustica
