Time reversal and the inverse filter.

  title={Time reversal and the inverse filter.},
  author={Micka{\"e}l Tanter and J L Thomas and Mathias Fink},
  journal={The Journal of the Acoustical Society of America},
  volume={108 1},
To focus ultrasonic waves in an unknown inhomogeneous medium using a phased array, one has to calculate the optimal set of signals to be applied on the transducers of the array. In the case of time-reversal mirrors, one assumes that a source is available at the focus, providing the Green's function of this point. In this paper, the robustness of this time-reversal method is investigated when loss of information breaks the time-reversal invariance. It arises in dissipative media or when the… CONTINUE READING
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