Development of a (3,1) drive multifilm piezopolymer hydrophone

A modified (3,1) drive hydrophone design described here utilizes polarized piezopolymer films taut in the stretch direction by a reformed structural construction. It mainly consists of two opposed polymer films attached to a phosphor bronze diaphragm through a perspex structure. Enhancement in sensitivity is achieved, by connecting the films electrically in series thereby adding up the voltages developed across them due to a given acoustic pressure. The response of the hydrophone for individual films and for their series combination, are measured from 300 Hz to 4 kHz.<
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