A High Efficiency, Wide Band Sound Projector for Acoustic Tomography and Global Ocean Monitoring

Award Information
Agency: Department of Defense
Branch: Office of the Secretary of Defense
Contract: N/A
Agency Tracking Number: 36455
Amount: $98,996.00
Phase: Phase I
Program: SBIR
Awards Year: 1997
Solitcitation Year: N/A
Solitcitation Topic Code: N/A
Solitcitation Number: N/A
Small Business Information
Webb Research Corp.
82 Technology Park Dr., E. Falmouth, MA, 02536
Duns: N/A
Hubzone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Douglass Webb
 (508) 548-2077
Business Contact
Phone: () -
Research Institution
N/A
Abstract
An 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.

* information listed above is at the time of submission.

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