Electroacoustic transducer calibration method and apparatus

Details Electroacoustic transducer calibration method and apparatus Electroacoustic transducer calibration method and apparatus

1983-02-25

1984-03-06

Kreitman, Stephen A.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

367 13, H04B 1100, H04R 2900

Patent

active

044346484

ABSTRACT:
Methods and apparatus for calibrating terminated ultrasonic electroacoustic transducers are disclosed. The transducers are excited by a driving signal to emit an ultrasonic acoustic wave, which wave is received either by the same transducer after reflection or by a second transducer to produce an output signal. The driving signal and output signal are supplied to measuring circuitry deriving transducer performance calibration signals, such as transducer gain, transducer sensitivity, acoustic field pressure and intensity. These performance characteristics of the transducer are measured in absolute terms under conditions of actual termination. The transducer characteristics are obtained in order to determine the acoustical performance of transducers useful in biomedical and other fields.

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