This model showcases the time reversal of acoustic waves.
The principle of time
reversal 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
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.