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第 38 卷 第 3 期                                                                       Vol. 38, No. 3
             2019 年 5 月                          Journal of Applied Acoustics                      May, 2019

             ⋄ 研究报告 ⋄



                           利用气枪声源数据的地声参数反演                                                   ∗





                          李佳蔚      1,2,3  贾雨晴     1,2,3  鹿力成      1,2†  郭圣明     1,2   马 力    1,2


                                              (1 中国科学院声学研究所       北京   100190)
                                         (2 中国科学院水声环境特性重点实验室           北京   100190)
                                                (3 中国科学院大学      北京  100049)

                摘要    该文通过对在东中国海采集的气枪声源数据进行处理，基于地声参数对不同声场观测量的敏感性差异，
                利用分步反演的策略进行分析。首先选择距离接收阵七个不同的距离点数据，通过 warping 变换准确提取第
                三阶至第八阶简正波的频散曲线；利用海底声速对频散曲线敏感的特性来反演声速；由 Hamilton 经验公式求
                得海底密度；通过传播损失拟合获得海底衰减。不同距离点数据反演的海底声速与密度一致性较高。实验提
                取的频散曲线和反演参数仿真结果、实验获取的传播损失与反演参数获得的传播损失均拟合较好。
                关键词     warping 变换，频散曲线，分步反演
                中图法分类号: TB56           文献标识码: A          文章编号: 1000-310X(2019)03-0440-08
                DOI: 10.11684/j.issn.1000-310X.2019.03.022





                            Inversion of geoacoustics parameters using air-gun data


                        LI Jiawei 1,2,3  JIA Yuqing 1,2,3  LU Licheng 1,2  GUO Shengming 1,2  MA Li 1,2

                                (1 Institute of Acoustics Chinese Academy of Sciences, Beijing 100190, China)
                       (2 Key Laboratory of Underwater Environment, Institute of Acoustics, Chinese Academy of Sciences,
                                                    Beijing 100190, China)
                                   (3 University of Chinese Academy of Sciences, Beijing 100049, China)

                 Abstract  This article deals with the acoustic data obtained from the air-gun sources in the East China Sea.
                 Since the seabed properties have great affects on the pressure field, transmission loss (TL), group speed etc.
                 taking into consideration the fact that geoacoustics parameters have different sensitivity for them, the strategy
                 of multi-step inversion is used in this paper. Seven source data at different distances use the warping transfor-
                 mation to extract the dispersion curves from third mode to eighth mode accurately. Then use the dispersion
                 curves to invert the sound speed. According to the Hamilton empirical function between the seabed sound
                 speed and bottom density to calculate the latter. The bottom attenuation is inverted by using transmission
                 loss. The inversion result of seabed sound velocity and density has a high consistency. The dispersion curves
                 and transmission loss calculated using the inverted parameters matches the experiment data well.
                 Key words warping transformation, Dispersion curves, Multi-step inversion



             2018-09-28 收稿; 2019-03-08 定稿
             国家自然科学基金项目 (11004214)
             ∗
             作者简介: 李佳蔚 (1991- ), 男, 山西定襄人, 博士研究生, 研究方向: 水声信号处理。
             †  通讯作者 E-mail: luce_1983@sina.com
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