| Time reversal of acoustic waves | |
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Quick start
To run the model, open TR.pro with Gmsh.
Additional information
This model showcases the time reversal of acoustic waves.
The principle of time reversal (https://en.wikipedia.org/wiki/Time_reversal_signal_processing) is to use the reversibility of the wave equation in non dissipative media to back-propagate a signal on the source that first emitted it. Time Reversal Mirrors (TRM), designed by Matthias Fink and his team in the 1990's, are composed of a large number of transducers which can play alternatively the role of emitters and receivers. Associated to a numerical treatment module, they are able to record a signal, time reverse it, and back propagate it into the medium. The applications are numerous, such as submarine communication or kidney stone destruction.
Several analyses are predefined: time reversal in free space or with randomly-distributed obstacles between the source and the TRM, using either a monochromatic or a broadband signal.
Model developed by @bthierry