An acoustic liquid processing device in the form of a vessel (12) having an interior wall which surrounds a process liquid (14). A transducer (13) having an acoustic impedance approximately equal to that of the process liquid (14) is attached to the interior wall to substantially envelop a selected volume of the process liquid (14). The transducer is preferably an electrostatic film transducer. The transducer is energized to subject the process liquid to acoustic vibration.
