This is very important. Can someone tell the dependency for the resonance frequencies of bubbles? i.e if know a bubble's diameter, the surface tension, the liquid and the gas' densities how do I calculate the sound wave frequencies that causes a resonance in a bubble. I have Landau's formula for droplets. But since gas is compressible and liquids aren't I guess there sould be some differences. I have also found another formula in the net which is an aproximation for vey small bubbles, but gives radical deviation for bigger quantities. In this formula the raduis of the bubbles raised to the power of -1. While in Landau's formula it in -3/2 (i.e. the resonance frequency is reversly proportional to square root of the 3-rd power of the raduis). If I'ld be very gratefull if someone gave me the exact formula.