| 摘 要： | The remote measurement of the vertical distribution of acousticalparameters of the sea bottom is an inverse method in acoustics.The existingmethods can be divided into two types:the wave method and the raymethod.The former usually does not apply to cases with discontinuity inacoustical parameter profiles,whereas the latter usually ignores the contribu-tions made by multiple reflections,resulting in the appearance of pseudo inter-faces.However,under certain practical circumstances,the ray method canproduce satisfactory results.In this paper,at first we use the conception ofequitime layer thickness to obtain the pulse response iteration method.Theanti-interference capability of this method is poor.In order to improve this ca-pability,we develope the sample iteration method and the sample-averagingiteration method.The sample-averaging iteration method introduces a way ofstatistical averaging,which can further improve the anti-interference capability.
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