SUMMARY

Three different techniques for a qualitative calibration of ultrasonic transducers were developed and tested extensively. In contrast to techniques for an absolute calibration, the transducers are tested without coupling to a test mass. In spite of this experimental simplification, the results are very satisfying and sufficient for most applications. Still they provide no basis for a proper deconvolution of ultrasonic and acoustic emission signals. This will be the subject of future work, considering also parameters like the phase information of the signals and the angle of incidence. ZUSAMMENFASSUN