Influence of bubble content on spectrum properties of laser-induced cavitation bubble collapse sound waves in liquid

Laser-induced cavitation bubble collapse sound waves in liquid are measured by the PZT hydrophone, and the bubble content of laser-induced cavitation bubble during the first oscillating cycle is calculated. In combination with the analysis of the effect on the maximum bubble radius and oscillating duration of the bubble content, the effect on sound wave spectrum properties of the bubble content is investigated. The results indicate that the bubble content increases with the increase of laser energy. The bubble content influences the intensity of bubble collapse, and larger bubble content leads to shorter oscillating duration. Moreover, the peak frequency decreases with the increase of the bubble content.