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Communication dans un congrès

Inversion of seabed acoustic parameters in shallow water using the warping transform

Juan Zeng N. Ross Chapman 1 Julien Bonnel 2 Li Ma Yan Chen
STIC - Pôle STIC [Brest], Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance
Abstract : In this paper, a method is described for inverting geoacoustic parameters of the seabed from short range field data recorded by single hydrophone. The original data in time domain are processed by a warping operator at first, and then the dispersion curve and the mode amplitude ratios are extracted separately from the warped data. The velocity and the density in the bottom are inverted from the dispersion curve, and the attenuation from the mode amplitude ratios, respectively. The performance of the method is examined using simulated data and then experimental data from the North Sea of China. The source used in the experiment was a small explosive charge that provided good signal to noise ratio over the frequency band from 200 Hz to 1 kHz. The depth of the water was about 30m, and the water sound speed was nearly constant with depth. The seabed geoacoustic parameters are inverted from the data received at different ranges from 2 to 14 km. The results from the different ranges are consistent with a simple half space model of the bottom. The seabed velocity is about 1600 m/s.
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Contributeur : Annick Billon-Coat <>
Soumis le : mercredi 10 juillet 2013 - 17:42:05
Dernière modification le : mercredi 24 juin 2020 - 16:19:28

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Juan Zeng, N. Ross Chapman, Julien Bonnel, Li Ma, Yan Chen. Inversion of seabed acoustic parameters in shallow water using the warping transform. ICA 2013, Jun 2013, Montreal, Canada. ⟨10.1121/1.4799786⟩. ⟨hal-00843206⟩



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