Method and Apparatus for Determining Relative Phase and Sensitivity of Elements in an Acoustic Array.
DEPARTMENT OF THE NAVY WASHINGTON D C
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Relative phase and sensitivity characteristics of individual transducer elements in a long acoustic array are determined by sequentially positioning a transmitting element in predetermined spaced relation to each array element by means of an array holding member and a through-like spacing member that contains a known transmission medium, driving the transmitting element with a test frequency input signal that is pulsed at a predetermined repetition rate, gating the output signal from the array element under test to an oscilliscope for phase comparison with an adjustably phase shifted version of the input signal, and measuring amplitudes of both input and output signals. Author
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