Low Frequency Underwater Projector for Long Range Acoustic Communications

Acentech proposes to develop an underwater sound projector source that can be used for Low Frequency Long Range Acoustic Communications, and which is operational down to a depth of 1000 m. This transducer design incorporates new high output magnetostrictive materials that are robust, malleable and machinable, and which are arranged in ring fashion along with an innovative displacement amplification system employing curved lamina. Preliminary modeling and analysis of this new transducer indicate output levels substantially in excess of those required are achievable at and above 100 Hz in water, with relatively low voltage drive levels. Furthermore, due to the non-resonant nature of its design, there is a nearly linear response in both the magitude and phase of the output within its target frequency range. This Phase I proposal describes our approach to achieving the desired design by structural and equivalent circuit analysis, parameter optimization, as well as by consultations with industry partners in the materials, fabrication and manufacturing space. The results we obtain from Phase I will prepare us for the analysis, building and testing of a functional prototype transducer in Phase II.