A High Efficiency, Wide Band Sound Projector for Acoustic Tomography and Global Ocean Monitoring
Small Business Information
Webb Research Corp.
82 Technology Park Dr., E. Falmouth, MA, 02536
AbstractAn acoustic projector suitable for long range signaling in the ocean is described. The design employs a novel approach, which could result in projectors of high performance, high efficiency, operation at any depth, and substantially reduced cost. Resolution of short pulses fundamentally requires acoustic energy spread over a broad band. Traditionally this has been done with projectors that perform well over the band of interest; however, this has led to costly designs for frequencies <= 250 Hz. A projector designed for a specific family of codes isdescribed. Starting with a simple, high efficiency, narrow band design, the system of energy storage in the projector is slowly and controllably changed, permitting an FM sweep over a broad band, that is, the required broad band is achieved by controlled and continuous tuning of a high efficiency narrow band projector. A prototype of the basic projector, without tuning, has been built and the performance is measured. A program for adding the tunable capability is proposed for Phase I as well as a digital simulation of the projector equivalent circuit to verify input/output amplitude and phase tracking.
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