Abstract
It is one of the most influential methods for the resolution of mechanism of atomization in Lthe case of high frequency ultrasonics to obtain the sound pressure in liquid.The sound pressure in liquid was precisely measured with hydrophone.The sound pressure distribution, density wave, instantaneous photoes, and the sound pressure in the swell and etc.were obtained.The sound pressure in the vicinity of center of curvature and the interior of swell are the largest.The cavitation air bubbles in the swell are corroborated and the relation to mechanism of atomization was introduced.