Inversion of shallow seabed structure and geoacoustic parameters with waveguide characteristic impedance based on Bayesian approach
Underwater acoustic technology is essential for ocean observation, exploration and exploitation, and its development is based on an accurate predication of underwater acoustic wave propagation. In shallow sea environments, the geoacoustic parameters, such as the seabed structure, the sound speeds, t...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-01-01
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| Series: | Frontiers in Marine Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2023.1104570/full |
| _version_ | 1828057907525058560 |
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| author | Hanhao Zhu Hanhao Zhu Yangyang Xue Qunyan Ren Qunyan Ren Xu Liu Jiahui Wang Zhiqiang Cui Shu Zhang Huili Fan |
| author_facet | Hanhao Zhu Hanhao Zhu Yangyang Xue Qunyan Ren Qunyan Ren Xu Liu Jiahui Wang Zhiqiang Cui Shu Zhang Huili Fan |
| author_sort | Hanhao Zhu |
| collection | DOAJ |
| description | Underwater acoustic technology is essential for ocean observation, exploration and exploitation, and its development is based on an accurate predication of underwater acoustic wave propagation. In shallow sea environments, the geoacoustic parameters, such as the seabed structure, the sound speeds, the densities, and the sound speed attenuations in seabed layers, would significantly affect the acoustic wave propagation characteristics. To obtain more accurate inversion results for these parameters, this study presents an inversion method using the waveguide characteristic impedance based on the Bayesian approach. In the inversion, the vertical waveguide characteristic impedance, which is the ratio of the pressure over the vertical particle velocity, is set as the matching object. The nonlinear Bayesian theory is used to invert the above geoacoustic parameters and analysis the uncertainty of the inversion results. The numerical studies and the sea experiment processing haven shown the validity of this inversion method. The numerical studies also proved that the vertical waveguide characteristic impedance is more sensitive to the geoacoustic parameters than that of single acoustic pressure or single vertical particle velocity, and the error of simulation inversion is within 3%. The sea experiment processing showed that the seabed layered structure and geoacoustic parameters can be accurately determined by this method. The root mean square between the vertical waveguide characteristic impedance and the measured impedance is 0.38dB, and the inversion results accurately represent the seabed characteristics in the experimental sea area. |
| first_indexed | 2024-04-10T21:19:35Z |
| format | Article |
| id | doaj.art-5d7bcf3f54c244ed98f4a9abb86c4dec |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-04-10T21:19:35Z |
| publishDate | 2023-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-5d7bcf3f54c244ed98f4a9abb86c4dec2023-01-20T06:52:14ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452023-01-011010.3389/fmars.2023.11045701104570Inversion of shallow seabed structure and geoacoustic parameters with waveguide characteristic impedance based on Bayesian approachHanhao Zhu0Hanhao Zhu1Yangyang Xue2Qunyan Ren3Qunyan Ren4Xu Liu5Jiahui Wang6Zhiqiang Cui7Shu Zhang8Huili Fan9Donghai Laboratory, Zhoushan, ChinaInstitute of Marine Science and Technology, Zhejiang Ocean University, Zhoushan, ChinaCollege of Underwater Acoustic Engineering, Harbin Engineering University, Harbin, ChinaKey Laboratory of Underwater Acoustic Environment, Chinese Academy of Sciences, Beijing, ChinaInstitute of Acoustics, Chinese Academy of Sciences, Beijing, ChinaInstitute of Marine Science and Technology, Zhejiang Ocean University, Zhoushan, ChinaSchool of Naval Architecture and Maritime, Zhejiang Ocean University, Zhoushan, ChinaSchool of Naval Architecture and Maritime, Zhejiang Ocean University, Zhoushan, ChinaChina Ship Development and Design Center, Wuhan, ChinaChina Ship Development and Design Center, Wuhan, ChinaUnderwater acoustic technology is essential for ocean observation, exploration and exploitation, and its development is based on an accurate predication of underwater acoustic wave propagation. In shallow sea environments, the geoacoustic parameters, such as the seabed structure, the sound speeds, the densities, and the sound speed attenuations in seabed layers, would significantly affect the acoustic wave propagation characteristics. To obtain more accurate inversion results for these parameters, this study presents an inversion method using the waveguide characteristic impedance based on the Bayesian approach. In the inversion, the vertical waveguide characteristic impedance, which is the ratio of the pressure over the vertical particle velocity, is set as the matching object. The nonlinear Bayesian theory is used to invert the above geoacoustic parameters and analysis the uncertainty of the inversion results. The numerical studies and the sea experiment processing haven shown the validity of this inversion method. The numerical studies also proved that the vertical waveguide characteristic impedance is more sensitive to the geoacoustic parameters than that of single acoustic pressure or single vertical particle velocity, and the error of simulation inversion is within 3%. The sea experiment processing showed that the seabed layered structure and geoacoustic parameters can be accurately determined by this method. The root mean square between the vertical waveguide characteristic impedance and the measured impedance is 0.38dB, and the inversion results accurately represent the seabed characteristics in the experimental sea area.https://www.frontiersin.org/articles/10.3389/fmars.2023.1104570/fullshallow seageoacoustic parameters inversionBayesian approachwaveguide characteristic impedancefast filed method |
| spellingShingle | Hanhao Zhu Hanhao Zhu Yangyang Xue Qunyan Ren Qunyan Ren Xu Liu Jiahui Wang Zhiqiang Cui Shu Zhang Huili Fan Inversion of shallow seabed structure and geoacoustic parameters with waveguide characteristic impedance based on Bayesian approach Frontiers in Marine Science shallow sea geoacoustic parameters inversion Bayesian approach waveguide characteristic impedance fast filed method |
| title | Inversion of shallow seabed structure and geoacoustic parameters with waveguide characteristic impedance based on Bayesian approach |
| title_full | Inversion of shallow seabed structure and geoacoustic parameters with waveguide characteristic impedance based on Bayesian approach |
| title_fullStr | Inversion of shallow seabed structure and geoacoustic parameters with waveguide characteristic impedance based on Bayesian approach |
| title_full_unstemmed | Inversion of shallow seabed structure and geoacoustic parameters with waveguide characteristic impedance based on Bayesian approach |
| title_short | Inversion of shallow seabed structure and geoacoustic parameters with waveguide characteristic impedance based on Bayesian approach |
| title_sort | inversion of shallow seabed structure and geoacoustic parameters with waveguide characteristic impedance based on bayesian approach |
| topic | shallow sea geoacoustic parameters inversion Bayesian approach waveguide characteristic impedance fast filed method |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2023.1104570/full |
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