Title: Acoustic field analysis of detection and location of targets in layered media by time reversal-reverse time migration mixed method

Author(s): GAO Xiang;LI Jian;SHI Fangfang;MA Jun;WANG Wen;WANG Chenghao;

Affiliation(s): Institute of Acoustics, Chinese Academy of Sciences; et al.

Abstract: Using the time reversal(TR)-reverse time migration(RTM) mixed method, the numerical analysis towards the acoustic field for detection and location of targets in layered media is performed. First the approaches and steps of the numerical analysis and simulation for acoustic field are proposed, then, the acoustic field distribution of single target and multiple targets are further computed by using the approaches of single emission-multiple receiving and multiple emission-multiple receiving. The numerical simulation results indicate that target detection and location can be well realized. By comparison, good results are obtained from the both two approaches, but large time-consuming is observed in way of multiple emission-multiple receiving, and so would be unacceptable. Additionally, the improved way is also proposed for multiple target detection.