It has been shown in previous papers that the action of a low-frequency acoustic field on the cavitation zone generated by a high-frequency one is an efficient method for increasing the activity of cavitation. In the interacting fields a non-additive enhancement of sonoluminescence was observed, sometimes exceeding many times the individual ones. The possible mechanism responsible of this phenomenon are discussed in the paper:
– broadening of the spectral composition of the resultant field;
– periodic decrease in the total quasi-static pressure in the low frequency field;
– suppression of clusterization of cavitation bubbles;
- generation of new nuclei by the fragmentation following low frequency bubbles collapse.
