SPATIAL COHERENCE AND TEMPORAL STABILITY OF THE LONG-RANGE SOUND FIELD IN SHALLOW WATER

The spatial coherence and temporal stability of long-range sound field in shallow water by usingexplosive sources are presented.A experiment was conducted in shallow water with depth of 38 m,the source and receiver depths were 7 m and 6 m,respectively,the longitudinal space correlationabove the thermocline was measured.Another was conducted in shallow water with depth of 60 m,the sources were at 25 and 30 m,and the receiver was at 25 m,the transverse,longitudinal and timecorrelations below the thermocline were measured.The experimental data show that strong spatialcoherence and temporal stability are present in the long-range sound field.     

浅海远程声场的空间相关性与时间稳定性

本文介绍浅海远程声场空间相关的一些实验结果。实验研究了不同距离、频率与带宽的空间相关,测量数据具有明显的距离与频率依赖关系。实验结果表明,在55至130公里的传播距离上跃变层之下的低频声场有较强的空间相关性与时间稳定性。