Very Low Frequency (VLF) Transducer

The proposed Research and Development effort will transition the technology advances identified during the trade-space studies in Phase I of this SBIR into an Engineering Development Model (EDM) of the new AASP VLF (the HAI HLF-1F transducer). These advances provide a transducer with an acoustic output of at least 150 dB re 1 uPa @ 1 m from 10 to 1,000 Hertz, no appreciable acoustic output in the stand-by condition, and a reduced total ownership cost. The EDM design of the HLF-1F will evolve from the proven design and technology of the HAI HLF-1D and HLF-1E transducers by combining important features of the two current AASP transducer with the technological advances identified in Phase I. The initial integrated design of the HLF-1F transducer will be reviewed with the SBIR TPOC during a Preliminary Design Review, and the initial piece-part drawings and purchased components will be reviewed during a Critical Design Review. After approval of the design, the EDM of the HLF-1F transducer will be built and tested and a Final Design Review will be conducted with the TPOC. If the Phase II Option is executed, any changes identified during the Phase II Final Design Review will be incorporated into the initial EDM design, modified parts will be procured, and a modified EDM of the HLF-1F transducer will be built and tested.