Geoacoustic Inversion Using Time Reversal of Ocean Noise

Ji Xing Qin, Boris Katsnelson, Oleg Godin, Zheng Lin Li

Research output: Contribution to journalArticlepeer-review


We present a passive geoacoustic inversion method using two hydrophones, which combines noise interferometry and time reversal mirror (TRM) techniques. Numerical simulations are firstly performed, in which strong focusing occurs in the vicinity of one hydrophone when Greens function (GF) is back-propagated from the other hydrophone, with the position and strength of the focus being sensitive to sound speed and density in the bottom. We next extract the GF from the noise cross-correlation function measured by two hydrophones with 8025-m distance in the Shallow Water 06 experiment. After realizing the TRM process, sound speed and density in the bottom are inverted by optimizing focusing of the back-propagated GF. The passive inversion method is inherently environmentally friendly and low-cost.

Original languageEnglish
Article number094301
JournalChinese Physics Letters
Issue number9
StatePublished - Aug 2017

Bibliographical note

Publisher Copyright:
© 2017 Chinese Physical Society and IOP Publishing Ltd.

ASJC Scopus subject areas

  • General Physics and Astronomy


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