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Space-frequency distribution of the vector field of broad-band sound in shallow water
Ren, Q.Y.; Hermand, J.P.; Piao, S.C. (2010). Space-frequency distribution of the vector field of broad-band sound in shallow water, in: IEEE (Ed.) Oceans 2010 MTS/IEEE Seattle. Innerspace: A Global Responsibility. Seattle, Washington, USA, September 20-23, 2010. Oceans (New York),
In: IEEE (Ed.) (2010). Oceans 2010 MTS/IEEE Seattle. Innerspace: A Global Responsibility. Seattle, Washington, USA, September 20-23, 2010. Oceans (New York). IEEE: New York. ISBN 978-1-4244-4333-8. , more
In: Oceans (New York). IEEE: New York. ISSN 0197-7385, more
Peer reviewed article  

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  • Ren, Q.Y., more
  • Hermand, J.P., more
  • Piao, S.C.

Abstract
    An uniform distribution often appears in the space-frequency plane for broad-band, low-frequency sound intensity generated by a moving source in a shallow water environment. Waveguide invariant theory is used to interpret this phenomenon, and it has been applied for inverse problems in underwater acoustics. A vector sensor has advantages in providing both pressure and particle velocity information about the sound field simultaneously, and a higher signal-to-noise ratio signal than a traditional hydrophone. In the present paper, the space-frequency distribution of broad-band vector acoustic signals in a Pekeris waveguide is investigated using normal mode theory. A comparison between experimental and predicted space-frequency distributions is made for the Yellow Shark environment. The effects of the sound speed profile of the water column, the existence of a soft sediment layer, the change of sound speed or thickness of the soft sediment on the space-frequency distribution are examined. The possibility of using space-frequency distributions to invert for environmental parameters is discussed.

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