Arrival structure of a distance source on the horizontal line array in deep ocean
The arrival signals of the horizontal line array (HLA) in the waveguide are not plane waves. The direction of maximum array output will not be the exact direction of the source. The acoustic pressure field can be expressed in terms of a normal mode expansion. The output of the HLA for a distance source in the waveguide is then constructed by summing up contributions of the normal mode response to each of the modes weighted in accordance to the frequency-wavenumber response of the array. The low and high order modes arrive at shallow and steep grazing angles, respectively. In deep ocean, a source away from the sound channel axis couples strongly with high order modes while weakly with low order modes. The direction of maximum output of a HLA deviates significantly from the horizontal direction.
array response horizontal line array deep ocean
Tongwei Zhang Kunde Yang
College of Marine, Northwestern Polytechnical University, Xi’an, China
国际会议
2010 IEEE 10th International Conference on Signal Processing(第十届信号处理国际会议 ICSP 2010)
北京
英文
2353-2356
2010-08-24(万方平台首次上网日期,不代表论文的发表时间)