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Geoacoustic Inversion Based on a Vector Hydrophone Array |
| PENG Han-Shu 1,2;LI Feng-Hua1 |
| 1National Laboratory of Acoustics, Chinese Academy of Sciences, Beijing 1000802Graduate School of the Chinese Academy of Sciences, Beijing 100049 |
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| Cite this article: |
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PENG Han-Shu, LI Feng-Hua 2007 Chin. Phys. Lett. 24 1977-1980 |
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Abstract We propose a geoacoustic inversion scheme employing a vector hydrophone array based on the fact that vector hydrophone can provide more acoustic field information than traditional pressure hydrophones. Firstly, the transmission loss of particle velocities is discussed. Secondly, the sediment sound speed is acquired by a matched-field processing (MFP) procedure, which is the optimization in combination of the pressure field and vertical particle velocity field. Finally, the bottom attenuation is estimated from the transmission loss difference between the vertical particle velocity and the pressure. The inversion method based on the vector hydrophone array mainly has two advantages: One is that the MFP method based on vector field can decrease the uncertain estimation of the sediment sound speed. The other is that the objective function based on the transmission loss difference has good sensitivity to the sediment attenuation and the inverted sediment
attenuation is independent of source level. The validity of the inverted parameters is examined by comparison of the numerical results with the experimental data.
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| Keywords:
43.30.Pc
43.30.Bp
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Received: 25 January 2007
Published: 25 June 2007
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| PACS: |
43.30.Pc
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(Ocean parameter estimation by acoustical methods; remote sensing; imaging, inversion, acoustic tomography)
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43.30.Bp
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(Normal mode propagation of sound in water)
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