Giant resonance in the dynamics of small bubbles

For bubble oscillations under medium and large pressure amplitudes a complicated scenario of bifurcations and coexisting (chaotic) attractors exists. However, for very small bubbles in a very strong sound field the dynamics becomes regular and a new type of strong resonance with a thresholdlike increase in oscillation amplitude occurs [E. A. Neppiras and B. E. Noltingk, Proc. Phys. Soc. London Ser. B 64, 1032 (1951); H. G. Flynn, in Physical Acoustics Vol. 1, edited by W. P. Mason (1964), p. 57; W. Lauterborn, Acustica 20, 105 (1968)]. This phenomenon has a strong influence on many properties of cavitation bubbles. The following aspects are considered: rectified diffusion, stability of the bubble under SBSL conditions, primary and secondary Bjerknes forces, and interpretation of bubble size measurements.