Apparatus and method for determining the phase sensitivity of hy

Details Apparatus and method for determining the phase sensitivity of hy Apparatus and method for determining the phase sensitivity of hy

1982-04-15

1984-06-05

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Testing, monitoring, or calibrating

73 1DV, H04R 2900

Patent

active

044532385

ABSTRACT:
A method and apparatus for determining the phase angle of the sensitivity of a hydrophone H to be calibrated. The method comprises positioning in a straight line a transducer P, the hydrophone H, and a reciprocal transducer T that can be used both as a hydrophone and a projector; determining the phase angles of a set of voltages and currents; and finding the phase angle of the sensitivity from the former phase angles. The apparatus includes a framework for positioning P, H and T in a straight line, an electronic system for monitoring the voltages and currents, and a programmed computer for performing a single-point DFT.

REFERENCES:
patent: 4090169 (1978-05-01), Adair et al.
R. J. Bobber, Underwater Electroacoustic Measurements, Naval Research Lab. 970, (pp. 28-30).

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