Browsing Reprints by Subject "Ocean acoustics"

Now showing items 1-7 of 7

    • Acoustic effects of internal microstructure 

      Mintzer, David (NATO. SACLANTCEN, 1975/10)

    • Beam spreading and loss of spatial coherence in an inhomogeneous and fluctuating ocean 

      McCoy, John J. (NATO. SACLANTCEN, 1975/10)
      A theory has been developed that enables estimates to be made of beam bending, beam spreading and loss of spatial coherence. In this paper we concentrate on the loss of spatial coherence due to scattering. Using a minus ...

    • Influence of internal waves on sound propagation in the SOFAR channel 

      Essen, Heinz-Hermann (NATO. SACLANTCEN, 1975/10)
      In this paper theoretical investigations due to the influence of internal waves to sound propagation in the SOFAR-channel are presented. The undisturbed acoustic field is described by a normal-mode model. The disturbance ...

    • Internal oceanographic microstructure phenomena 

      Tait, Robert I. (NATO. SACLANTCEN, 1975/10)
      This paper is concerned with the nature and causes of both fine structure and microstructure in the ocean. Following an account of the acoustic/oceanographic background to subject, the characteristics of fine structure are ...

    • Random temperature structure as a factor in long-range propagation 

      Del Balzo, Donald R.; Moseley, W. B. (NATO. SACLANTCEN, 1975/10)
      A statistical description of horizontal thermal microstructure in anosotropic turbulence is developed for application with an existing acoustic propagation theory. The model predicts a temperature power density spectrum ...

    • Some effects of large-scale oceanography on acoustic propagation 

      Guthrie, A. N.; Shaffer, John D.; Fitzgerald, R. M. (NATO. SACLANTCEN, 1975/10)
      A propagation experiment was conducted along a great circle track in the North American Basin, beginning at a point 400 km north of Antigua, W.I. and ending at the Grand Banks of Newfoundland. Shallow explosive sources ...

    • Two dimensional internal-wave spectra 

      Bell, T. H.; Bergin, J. M.; Dugan, J. P.; Hamilton, Z. C. B.; Morris, W. D.; Okawa, B. S.; Rudd, E. E.; Witting, J. (NATO. SACLANTCEN, 1975/10)
      Although spatial fluctuations of the sound speed in the ocean have a variety of causes, internal waves are thought to produce most of the fluctuations over horizontal scales ranging from several tens of metres to several ...