Now showing items 1-3 of 3

    • Experimental demonstration of the focused acoustic field in the ocean 

      Akal, Tuncay; Ferla, Melchiorre C.; Kuperman, William A.; Hodgkiss, W. S.; Song, H. C.; Jackson, Darrell R. (NATO. SACLANTCEN, 1998/10)
      An experiment conducted in the Mediterranean Sea in April1996 demonstrated that a time reversal mirror (or phase conjugate array) can be implemented to spatially and temporally refocus an incident acoustic field back to ...
    • High-frequency normal-mode calculations in deep water 

      Ferla, Melchiorre C.; Jensen, Finn B.; Kuperman, William A. (NATO. SACLANTCEN, 1982/10)
      A method has been developed to perform high-frequency deep-water normal-mode calculations in the multikilohertz region in water depths of the order of 5 km. The results from this technique agree with fast field program ...
    • Temporal and spatial variabilities in shallow water acoustics: measurements and predictions 

      Ali, Hassan B.; Ferla, Melchiorre C.; Akal, Tuncay (NATO. SACLANTCEN, 1985/03)
      An acoustic signal propagating in the sea is generally degraded not only by interactions with the bottom and surface boundaries, but also by volume inhomogeneities caused by non-uniformities in temperature, density, and ...