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Amplitude and phase calibration of hydrophones by heterodyne and time-gated time-delay spectrometry

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1 Author(s)
C. Koch ; Ultrasonics Sect., Phys. Tech. Bundesanstalt, Braunschweig, Germany

Two methods for the amplitude and phase calibration of hydrophones based on time-delay spectrometry are presented: a time-gating technique and heterodyne frequency conversion that allows the phase-locked (i.e., coherent) detection of hydrophone signals. Amplitude and phase of the hydrophone sensitivity are obtained in the frequency range 1-20 MHz. In addition, to show the broad-band capabilities of the methods, amplitude values are measured between 4 and 50 MHz.

Published in:

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control  (Volume:50 ,  Issue: 3 )