Comparison and visualization of focusing wave fields from various time reversal techniques in elastic media

2013 ◽  
Vol 134 (6) ◽  
pp. EL527-EL533 ◽  
Author(s):  
Brian E. Anderson ◽  
Timothy J. Ulrich ◽  
Pierre-Yves Le Bas
Keyword(s):  
Time Reversal ◽  
Elastic Media ◽  
Wave Fields

Energy flux imaging method for time reversal in elastic media.

2009 ◽  
Vol 125 (4) ◽  
pp. 2521-2521
Author(s):  
Brian E. Anderson ◽  
Robert A. Guyer ◽  
Timothy J. Ulrich ◽  
Pierre‐Yves Le Bas ◽  
Carene Larmat ◽  
...  
Keyword(s):  
Energy Flux ◽  
Time Reversal ◽  
Imaging Method ◽  
Elastic Media

scholarly journals Time reversal of continuous-wave, steady-state signals in elastic media

2009 ◽  
Vol 94 (11) ◽  
pp. 111908 ◽  
Author(s):  
Brian E. Anderson ◽  
Robert A. Guyer ◽  
Timothy J. Ulrich ◽  
Paul A. Johnson
Keyword(s):  
Steady State ◽  
Time Reversal ◽  
Continuous Wave ◽  
Elastic Media

scholarly journals Retrofocusing of Acoustic Wave Fields by Iterated Time Reversal

2004 ◽  
Vol 64 (6) ◽  
pp. 1954-1986 ◽  
Author(s):  
B. Lars G. Jonsson ◽  
Maarten V. de Hoop ◽  
Mats Gustafsson ◽  
Vaughan H. Weston
Keyword(s):  
Acoustic Wave ◽  
Time Reversal ◽  
Wave Fields

Quantifying the depth profile of time reversal focusing in elastic media

2014 ◽  
Vol 136 (4) ◽  
pp. 2265-2265
Author(s):  
Brian E. Anderson ◽  
Marcel C. Remillieux ◽  
Timothy J. Ulrich ◽  
Pierre-Yves Le Bas
Keyword(s):  
Depth Profile ◽  
Time Reversal ◽  
Elastic Media

Time-reversal algorithms in viscoelastic media

2013 ◽  
Vol 24 (4) ◽  
pp. 565-600 ◽  
Author(s):  
HABIB AMMARI ◽  
ELIE BRETIN ◽  
JOSSELIN GARNIER ◽  
ABDUL WAHAB
Keyword(s):  
Time Reversal ◽  
Viscoelastic Medium ◽  
Cross Correlation ◽  
Helmholtz Decomposition ◽  
Elastic Media ◽  
Attenuation Effect ◽  
Imaging Algorithm ◽  
Viscoelastic Media ◽  
First Order ◽  
Correlation Techniques

In this paper we consider the problem of reconstructing sources in a homogeneous viscoelastic medium from wavefield measurements. We first present a modified time-reversal imaging algorithm based on a weighted Helmholtz decomposition and justify mathematically that it provides a better approximation than by simply time reversing the displacement field, where artifacts appear due to the coupling between the pressure and shear waves. Then we investigate the source inverse problem in an elastic attenuating medium. We provide a regularized time-reversal imaging which corrects the attenuation effect at the first order. The results of this paper yield the fundamental tools for solving imaging problems in elastic media using cross-correlation techniques.

scholarly journals Time reversal reconstruction of finite sized sources in elastic media

2011 ◽  
Vol 130 (4) ◽  
pp. EL219-EL225 ◽  
Author(s):  
Brian E. Anderson ◽  
Michele Griffa ◽  
Timothy J. Ulrich ◽  
Paul A. Johnson
Keyword(s):  
Time Reversal ◽  
Elastic Media

Time reversal of monochromatic signals in elastic media.

2009 ◽  
Vol 125 (4) ◽  
pp. 2594-2594
Author(s):  
Brian E. Anderson ◽  
Robert A. Guyer ◽  
Timothy J. Ulrich ◽  
Paul A. Johnson
Keyword(s):  
Time Reversal ◽  
Elastic Media
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