文献类型：期刊文献

英文题名：A simplified model for acoustic focalization in environments with seabed uncertainties

作者：Qu, Ke[1];Ou, Zhenyi[1];Huang, Xin[2];Liu, Liwen[3,4]

机构：[1]Guangdong Ocean Univ, Coll Elect & Informat Engn, Zhanjiang, Peoples R China;[2]Guangdong Ocean Univ, Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang, Peoples R China;[3]Northwestern Polytech Univ, Sch Marine Sci & Technol, Xian, Peoples R China;[4]Xian Inst Precis Mech, Xian, Peoples R China

年份：2023

卷号：10

外文期刊名：FRONTIERS IN PHYSICS

收录：SCI-EXPANDED(收录号：WOS:000915090100001)、、EI(收录号：20233514652363)、Scopus(收录号：2-s2.0-85146513876)、WOS

基金：Funding This research was funded by the Natural Science Foundation of Guangdong Province grant number [2022A1515011519].

语种：英文

外文关键词：focalization; matched field processing; geoacoustic parameter; genetic algorithm; geoacoustic model

外文摘要：Introduction: Parameter mismatch poses a challenge to source localization in cases involving environments with seabed uncertainties. By including environmental parameters in the search space, focalization can be used to estimate the location of the source using environmental information that is limited a priori. Methods: To reduce the number of parameters, a simplified seabed model is proposed here for such focalization. Only two geoacoustic parameters-the amplitude F and phase c ( F ) of reflection-are used to describe the seabed. Focalization is generally tested using genetic algorithms for the colored noise case (COLNOISE) benchmark problem. Results: The proposed simplified model can obtain the location of the source more easily than a layered model. Due to its advantage in terms of parameter sensitivity and inter-coupling, the simplified model can ensure the robustness of the results of inversion. The proposed method was tested on a broadband signal in the Asian Seas International Acoustics Experiment (ASIAEX2001), where both the location and the geoacoustic parameters were easily inverted. Discussion: The simplified model provides a sufficiently high acoustic resolution for focalization, and its reduction of the geoacoustic parameters helpes solve the problem of inversion.