FIELD: measurement of ultrasonic emissive power in water and biologic media for engineering and medicine. SUBSTANCE: calibrated resonant-frequency power P1 corresponding to maximum efficiency of electric-to-emissive power conversion is supplied to ultrasonic transducer. Signal arriving from thermal element T1 held in thermal contact with ultrasonic transducer is recorded. Electric power frequency is measured at its exit from resonance-tuned zone and electric power P2 supplied to ultrasonic converter is also measured. Signal arriving from thermal element T2 is recorded in the process. Ultrasonic transducer power is found from expression Pem = P1 - (P2 x T1)/T2. EFFECT: improved measurement accuracy. 1 dwg
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