The effect of ultrasonic waves on the occurrence of a discharge in a liquid

An equation similar to the Rayleigh equation is obtained, describing the oscillation of a single small bubble in a liquid, taking into account the compressibility of the liquid when exposed to a sound wave. Calculations of the dynamics of the bubble show that there are two possible variants of such an impact: the convergence of the bubble or its sharp expansion, depending on the frequency of the sound wave. The change in behavior occurs abruptly with a small change in frequency. Theoretically, this can lead to unexpected physical effects, for example, the formation of a high-temperature ionized gas, which causes a discharge in an electric field.