Interference structure of shallow water reverberation in time-frequency distribution  

作　　者：LI FengHua ZHANG YanJun ZHANG RenHe LIU JianJun 

机构地区：[1]National Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China [2]Graduate University of Chinese Academy of Science,Beijing 100190,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2010年第8期1408-1411,共4页中国科学:物理学、力学、天文学(英文版)

基　　金：supported by the National Natural Science Foundation of China (Grant No. 10734100)

摘　　要：The striations of the reverberation spectrum in the time-frequency distribution were observed in a shallow water acoustic experiment in 2002. A model following the coherent reverberation model developed in 2002 is presented to explain the observed striations. To examine the consistency between the measured data and numerical predictions, we have used a method based on Radon transform for determining the slope of the striations to the measured reverberation data and numerical predictions. The results indicate that the previously developed coherent reverberation model can predict the interference structure of the reverberation intensity in the time-frequency distribution.The striations of the reverberation spectrum in the time-frequency distribution were observed in a shallow water acoustic experiment in 2002. A model following the coherent reverberation model developed in 2002 is presented to explain the observed striations. To examine the consistency between the measured data and numerical predictions, we have used a method based on Radon transform for determining the slope of the striations to the measured reverberation data and numerical predictions. The results indicate that the previously developed coherent reverberation model can predict the interference structure of the reverberation intensity in the time-frequency distribution.

关 键 词：REVERBERATION INTERFERENCE TIME-FREQUENCY waveguide invariant 

分 类 号：O427.2[理学—声学]