Focussing electroacoustic transducer and method for testing its output power

摘要

With a focusing electroacoustic transducer with a carrier which on its front side is equipped with a first group and on its rear side with a second group of ceramic piezolelements, a testing of the transducer power in a transducer test operating mode is carried out in that one of the element groups on the front or rear side is impinged with a high voltage impulse corresponding to the high voltage produced on normal operation of the transducer, and thereupon a secondary voltage impulse serving as a measurement voltage which at the same time is produced by a mechanical loading of the piezoelements of the other group transmitted by the carrier, as a measure of the present transducer power of the activated element group is compared to pregiven, previously determined and stored reference values of the transducer power of the activated element group.