Research Article

Modeling and Simulation of Parametric Nonlinear Focused Ultrasound in Three-Dimensional Bubbly Liquids with Axial Symmetry by a Finite-Element Model

Figure 3

Dispersive curves of the bubbly medium used in Section 3. (a) Sound speed, (b) attenuation coefficient, and (c) compressibility. Vertical red lines show (in order from left to right) , , , , , and .