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

@article{Koch2003AmplitudeAP,
  title={Amplitude and phase calibration of hydrophones by heterodyne and time-gated time-delay spectrometry},
  author={Christian Koch},
  journal={IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control},
  year={2003},
  volume={50},
  pages={344-348}
}
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. 

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