Ambient noise cross correlation in free space: theoretical approach.

@article{Roux2005AmbientNC,
  title={Ambient noise cross correlation in free space: theoretical approach.},
  author={Philippe Roux and Karim Sabra and W. A. Kuperman and A. Roux},
  journal={The Journal of the Acoustical Society of America},
  year={2005},
  volume={117 1},
  pages={79-84}
}
It has been experimentally demonstrated that the Green's function between two points could be recovered using the cross-correlation function of the ambient noise measured at these two points. This paper investigates the theory behind this result in the simple case of a homogeneous medium with attenuation. 

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