Model equation for strongly focused finite-amplitude sound beams

  title={Model equation for strongly focused finite-amplitude sound beams},
  author={Kamakura and Ishiwata and Matsuda},
  journal={The Journal of the Acoustical Society of America},
  volume={107 6},
A model equation that describes the propagation of sound beams in a fluid is developed using the oblate spheroidal coordinate system. This spheroidal beam equation (SBE) is a parabolic equation and has a specific application to a theoretical prediction on focused, high-frequency beams from a circular aperture. The aperture angle does not have to be small. The theoretical background is basically along the same analytical lines as the composite method (CM) reported previously [B. Ystad and J… CONTINUE READING