Title :
Analysis of the difference-frequency wave generated by the interaction of two axisymmetric and co-focused ultrasound beams
Author :
Silva, G.T. ; Mitri, F.G.
Author_Institution :
Inst. de Fis., Univ. Fed. de Alagoas, Maceio
Abstract :
We investigate the interaction of two co-focused ultrasound beams at different frequencies in the presence of an inclusion inside the focal region. We solved the boundary-value problem based on the Aanonsen´s nonlinear wave equation in the parabolic approximation. A comparison between the theory and experimental data for the scattering by a small sphere is presented. Results are in good agreement with the presented theory.
Keywords :
boundary-value problems; nonlinear acoustics; ultrasonic focusing; ultrasonic waves; Aanonsen nonlinear wave equation; axisymmetric ultrasound beams; boundary-value problem; cofocused ultrasound beams; difference-frequency wave; parabolic approximation; Acoustic beams; Acoustic imaging; Acoustic propagation; Acoustic scattering; Acoustic waves; Frequency; Nonlinear equations; Partial differential equations; Particle scattering; Ultrasonic imaging; Interaction of Sound-withsound; Parametric Array; Scattering; Vibro-acoustography;
Conference_Titel :
Ultrasonics Symposium, 2008. IUS 2008. IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2428-3
Electronic_ISBN :
978-1-4244-2480-1
DOI :
10.1109/ULTSYM.2008.0321
