Browsing Reprints by Subject "Ray acoustics"

Now showing items 1-5 of 5

    • A relation between multipath group velocity, mode number, and ray cycle distance 

      Harrison, Chris H. (CMRE, 2014/01)
      Weston's ray invariant or "characteristic time" in a range-dependent environment is exactly equivalent to the Wentzel-Kramers-Brillouin phase integral for ducted normal modes. By considering a ray element it is shown that ...

    • Deterministic methods of sound field computation 

      Spofford, C. W.; Garon, H. M. (NATO. SACLANTCEN, 1975/10)
      Models for acoustic propagation in the ocean environment have matured to a level where they are used routinely to estimate deterministic phenomena and, most recently, have been applied to the investigation of stochastic ...

    • Intensity calculations along a single ray 

      Krol, Hans R. (NATO. SACLANTCEN, 1974/02)
      A method is presented for the calculation of sound intensity using only one ray. The sound-velocity profile is assumed to be continuous up to the second derivative and it is supposed that the ray equations are solved ...

    • Some ray and intensity solutions in the complex plane 

      Krol, Hans R. (NATO. SACLANTCEN, 1974/02)
      This paper presents a method to test range-dependent ray-tracing programs. The method is based on complex-function theory. From an analytic function that has a zero point at the emitter, expressions for sound speed, ray ...

    • The relation between the waveguide invariant, multipath impulse response, and ray cycles 

      Harrison, Chris H. (NURC, 2012/04)
      The waveguide invariant, b, that manifests itself as interference fringes or "striations" in a plot of frequency vs source-receiver separation, is usually thought of as a modal phenomenon. This paper shows that striations ...