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The general expression of the spatia lcross-spectral density function of ambient sea noise field isdeveloped,based on the theory of“local spectrum of underwater ambient noise field”presented byXu Zhenyong(1977).Spatial cross-spectra of several typical cases are calculated.The resultantexpression for deep-sea model with the uniform sound velocity profile is consistent with that developedby Cron and Sherman(1962,1965)except for an additional term which is due to inhomo-geneousplane waves and can be neglected when the depth of receivers is much greater than the distanse se-parating the receovers.Finally,the comparison of some theoretical calculations and eariler obtainedexperimental data is also given.
The general expression of the spatia lcross-spectral density function of ambient sea noise field isdeveloped, based on the theory of “local spectrum of underwater ambient noise field ” presented by Xu Zhenyong (1977). Spatial cross-spectra of several typical cases are calculated. The result is expressed in a deep-sea model with the uniform sound velocity profile is consistent with that developed by Cron and Sherman (1962, 1965) except for an additional term which is due to inhomo-geneous plane waves and can be neglected when the depth of receivers is much greater than the distanse se-parating the recedes. Finally, the comparison of some theoretical calculations and eariler obtainedexperimental data is also given.