Abstract

In exemplary embodiments, an ultrasonic transducer serves as vibration generator. It is an object of the disclosure to construct such an apparatus which, with the simplest technical construction, is functionally reliable and can be operated in a very adaptable manner and which is simultaneously especially productive with regard to the desired destruction effect. In accordance with the disclosure this object is achieved in that an ultrasonic transducer to be focused on the calculus serves as a direct acoustic irradiator for the calculus, which irradiator has a surface area such that the sound energy per square unit along the transmission path is sufficiently small so as to avoid tissue damage on the one hand, but is sufficiently great at the focus point that is suffices for the destruction of the calculus disposed at the focus, on the other hand.