Print Email Facebook Twitter Parametric array technique for microbubble excitation Title Parametric array technique for microbubble excitation Author Vos, H.J. Goertz, D.E. van der Steen, A.F.W. de Jong, N. Publication year 2011 Abstract This study investigates the use of an acoustic parametric array as a means for microbubble excitation. The excitation wave is generated during propagation in a nonlinear medium of two high-frequency carrier waves, whereby the frequency of the excitation wave is the difference frequency of the carrier waves. Carrier waves of around 10 and 25 MHz are used to generate low-frequency waves between 0.5 and 3.5 MHz at amplitudes in the range of 25 to 80 kPa in water. We demonstrate with high-speed camera observations that it is possible to induce microbubble oscillations with the low frequency signal arising from the nonlinear propagation process. As an application, we determined the resonance frequency of Definity contrast agent microbubbles with radius ranging from 1.5 to 5 μm by sweeping the difference frequency in the range from 0.5 to 3.5 MHz. © 2011 IEEE. Subject Fluid Mechanics Chemistry & EnergeticsPID - Process & Instrumentation DevelopmentTS - Technical SciencesElectronicsIndustrial Innovation To reference this document use: http://resolver.tudelft.nl/uuid:93664ef4-3d5e-47d3-b1b1-349e750d81a9 TNO identifier 430122 ISSN 0885-3010 Source IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 58 (5), 924-934 Article number No.: 5776747 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.