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Underwater Acoustics and Ocean Dynamics pp 1–9Cite as

Inference of Sound Attenuation in Marine Sediments from Modal Dispersion in Shallow Water

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Abstract

Attenuation of sound in the seabed plays an important role in predicting transmission loss in shallow water waveguides. Methods to invert the attenuation from low-frequency acoustic field data include time-frequency techniques that make use of modal dispersion. Since modal separation improves as a sound signal that propagates to longer ranges, most of the inversion methods based on modal dispersion were carried out with long range data. Recently a time-warping signal processing technique was introduced that enables high resolution of modes at relatively short ranges. Time-warping involves an axis transformation that transforms the original time-frequency relationship of the modes to a new domain in which the modes are approximately tonal and are well resolved. This paper shows that the inversion can be carried out directly in the time-warped domain, and extends the work to estimate low-frequency seabed attenuation.

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Author information

Authors and Affiliations

  1. School of Earth and Ocean Sciences, University of Victoria, Victoria, BC, V8P5C2, Canada

    N. Ross Chapman

  2. Laboratory of Underwater Environment, Institute of Acoustics, CAS, Beijing, 100190, China

    Juan Zeng

Authors
  1. N. Ross Chapman
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  2. Juan Zeng
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Corresponding author

Correspondence to N. Ross Chapman .

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Editors and Affiliations

  1. Hangzhou Applied Acoustics Institute , Hangzhou, Zhejiang, China

    Lisheng Zhou

  2. College of Information Science & Electronic Engineering, Zhejiang University, Hangzhou, Zhejiang, China

    Wen Xu

  3. Hangzhou Applied Acoustics Institute , Hangzhou, Zhejiang, China

    Qianliu Cheng

  4. College of Information Science & Electronic Engineering, Zhejiang University, Hangzhou, Zhejiang, China

    Hangfang Zhao

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© 2016 Zhejiang University Press and Springer Science+Business Media Singapore

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Chapman, N.R., Zeng, J. (2016). Inference of Sound Attenuation in Marine Sediments from Modal Dispersion in Shallow Water. In: Zhou, L., Xu, W., Cheng, Q., Zhao, H. (eds) Underwater Acoustics and Ocean Dynamics. Springer, Singapore. https://doi.org/10.1007/978-981-10-2422-1_1

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