Magnetostrictive ring transducers are rugged and relatively insensitive to hydrostatic pressure when used in a free-flooded condition. Therefore, arrays of this type of transducer are ideally suited for deep submergence applications provided acoustic beam directionality is not required.nThis report is concerned with measurements made on a single line of free-flooded, coaxially mounted magneto-strictive ring transducers and on two lines of meshed rings arranged to simulate segments of a biplanar array. The data presented shows the importance of spacing and arrange-ment of transducers in relation to the cancellation of generated acoustic pressures along selected array axes and provides information which will be useful in planning tests on a 50 ring biplanar array.
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