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In this paper the operation of a thermoacoustic sensor used for the determination of ultrasonic power is described. Its most essential component is an ultrasound-absorbing plate which transforms the incident ultrasonic energy into heat. From the temperature increase measured at the rear surface of the absorber and its thermal and acoustic properties, the absolute value of incident ultrasonic power...
In der Arbeit wird ein thermoakustischer Sensor für die Messung der Leistung von Ultraschallwellen beschrieben, die normalerweise für bildgebende Verfahren in der Medizin und Technik verwendet werden. Der Sensor besteht aus zwei unterschiedlich absorbierenden planparallelen Platten. Es wird gezeigt, daß die Temperatur in dem Sensor ansteigt, wenn man ihn in das Schallfeld eines Ultraschallwandlers...
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