Abstract
A second harmonic sound pressure emitted from a micro-bubble, which is used as contrast agent for ultrasound imaging, in an acoustic field is theoretically studied. A thermal damping effect of the bubble oscillation is taken into account. An acoustic pressure amplitude “(ΔPL)” is assumed to be sufficiently smaller than a surrounding pressure “PLO” and a weak non-linearity of the bubble motion is analyzed. Governing equations are perturbed up to O ((ΔPL) 2/P2L0). From O ((ΔPL) /PL0) and O ((ΔPL) 2/P2L0) solutions, algebraic correlation equation of the second harmonic sound is derived. The numerical simulation is also performed. The simulation results show good agreement with the present correlation equation in the case of (ΔPL) /PL0<<1. The limitation of the present theory is discussed at the higher (ΔPL).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
