USA flag logo/image

An Official Website of the United States Government

Mitigation of Biologically Induced Active Sonar Reverberation in Littoral…

Award Information

Agency:
Department of Defense
Branch:
N/A
Award ID:
Program Year/Program:
2013 / SBIR
Agency Tracking Number:
N131-045-0212
Solicitation Year:
2013
Solicitation Topic Code:
N131-045
Solicitation Number:
2013.1
Small Business Information
Signal Systems Corporation
877 Baltimore Annapolis Blvd Suite 210 Severna Park, MD -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2013
Title: Mitigation of Biologically Induced Active Sonar Reverberation in Littoral Regions
Agency: DOD
Contract: N00024-13-P-4003
Award Amount: $79,930.00
 

Abstract:

The proposed effort develops and evaluates features exploiting the swim bladder resonance observed in broadband echoes from fish for automatic screening, reducing mid-frequency active sonar clutter. Real world data from shallow water is used to develop and evaluate features for discriminating between the broad peaks characteristic of an aggregate echo from a school of fish and the comparatively flat echo from target and target-like scatterers. Exploitation of this feature is important because biologics can produce high level echoes, move, and are not amenable to other sensing modalities. Because the frequency and sharpness of the resonances depend strongly on the relative density of fish species and their depth, physically motivated features of the spectral shape and auto-regressive coefficients from speech recognition are leading candidates for investigation. Another product of the work is an understanding of the system bandwidth required to achieve reliable automatic screening of fish echoes without significantly reducing target detections. Beyond the benefits of reliable screening, the developed features themselves offer the potential to improve associations in automatic tracking. This project will demonstrate the feasibility of exploiting fish swim bladder resonances to improve automatic screening and tracking performance of U.S. Navy mid-frequency active sonar systems.

Principal Investigator:

John Murray
Principal Engineer
(410) 431-7148
jmurray@signalsystemscorp.com

Business Contact:

Laurence Riddle
President
(410) 431-7148
larry@signalsystemscorp.com
Small Business Information at Submission:

Signal Systems Corporation
877 Baltimore Annapolis Blvd Suite 210 Severna Park, MD -

EIN/Tax ID: 521943944
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No