Effect of sound speed profile on the structure of long-range acoustic pulse  

作　　者：WU Shuanglin QIN Jixing LI Zhenglin WU Yushen ZHANG Renhe 

机构地区：[1]State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190 [2]University of Chinese Academy of Sciences,Beijing 100049 [3]School of Ocean Engineering and Technology,Sun Yat-sen University,Zhuhai 519000 [4]Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519082

出　　处：《Chinese Journal of Acoustics》2024年第1期64-81,共18页声学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (11874061,U22A2012);the Youth Innovation Promotion Association of Chinese Academy of Sciences (2021023)。

摘　　要：The time arrival structure of acoustic pulse signals propagating in ocean waveguides is of great significance for underwater acoustic communication and navigation. Using the deep-sea sound propagation data from the experiments respectively conducted in the East Indian Ocean(EIO) and the South China Sea(SCS) with explosion sources near the sound channel axis(SCA), long-range transmission loss(TL) and time arrival structure of acoustic pulses for different sound speed profiles(SSPs) are compared. In the EIO environment, sound energy transmitting along the SCA is relatively large, and the corresponding signals arrive first, whereas signals propagating away from the SCA arrive late. In the full receiving depth, it shows a branch structure where the waveform near the SCA arrives earlier than other depths, which is totally different with the characteristics of the sound pulse in the SCS. Combined with the parametric mathematical model of deep-sea sound channel, the influence mechanism of SSP on the time arrival structure of long-range pulse propagation is theoretically analyzed, which well explains the phenomenon observed in the two experiments.

关 键 词：depths INDIAN SOUND 

分 类 号：TB56[交通运输工程—水声工程]