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Acoustical imaging through a multiple scattering medium using a time-reversal mirror.

P Roux¹, A Derode, A Peyre

¹Laboratoire Ondes et Acoustique, Université Paris 7. philippe.roux@espci.fr

The Journal of the Acoustical Society of America

|February 25, 2000

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Time-reversal principles enable acoustical imaging through highly disordered media. This technique surprisingly yields better images than classical methods in homogeneous environments.

Area of Science:

Physics
Acoustics
Wave Phenomena

Background:

Acoustical imaging relies on focusing acoustic beams.
Focusing through high-order multiple scattering media is challenging due to unknown electronic delay lines.

Purpose of the Study:

To demonstrate the feasibility of acoustical imaging through highly disordered media.
To investigate the effectiveness of time-reversal principles for this purpose.

Main Methods:

Application of time-reversal principles.
Acoustic beam focusing in a multiple scattering environment.

Main Results:

Successful image acquisition through a very disordered medium.
Achieved superior image quality compared to classical imaging in homogeneous media.

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Conclusions:

Time-reversal principles offer a viable solution for acoustical imaging in complex scattering environments.
This method surpasses conventional techniques in disordered media, opening new possibilities for advanced imaging applications.