Multi-Dimensional Ambient Noise Model -- 18-005
Navy SBIR FY2018.1

Sol No.: Navy SBIR FY2018.1
Topic No.: N181-082
Topic Title: Multi-Dimensional Ambient Noise Model -- 18-005
Proposal No.: N181-082-0105
Firm: Metron, Inc.
1818 Library Street
Suite 600
Reston, Virginia 20190
Contact: John Gebbie
Phone: (703) 467-5631
Web Site:
Abstract: The Navy needs a multi-dimensional ambient noise model (MDAMN) which can account for the characteristics of noise due to wind, wave action, rain and shipping as a function of time, direction and location over a broad range of tactical frequencies and operational environments. Metron proposes to build an MDANM tool that aims to maximally leverage all available information sources and computes the directional noise field and associated array gain in an accurate and efficient manner. One of the key differentiators of the proposed product is its ability to adaptively adjust the underlying physics models and input data sources based on the use case parameters to provide proper tradeoff between speed and accuracy. A second differentiator is the combined use of Monte Carlo methods with real time shipping information to improve shipping noise estimates. The framework components of MDANM will be based on feedback from stakeholders and end-users for output to the next-generation Submarine Tactical Decision Aid (STDA). Enhancing the reliability and accuracy of detection modeling will lead to an increase the utility of TDAs, and allow operators to make better strategic and/or tactical recommendations.
Benefits: The result of the proposed Phase I research will be a design plan for a new prototype multi-dimensional ambient noise model (MDANM) that will ultimately be capable of predicting the temporally dependent ambient noise field as a function of geographic position, direction, and time over a broad range of tactical frequencies (10s of Hz to 100s of kHz) and operational environments. The design plan will specify the proposed architecture, protocols, and formats for MDANM input and output to the next-generation Tactical Decision Aid (TDA). The Phase I Option period will prepare for workshops to be conducted at the beginning of Phase II. These workshops will help refine specifications for the data visualization and user interface in the MDANM tool. They will involve end-users of the proposed MDANM tool from the IUSS, Surface and Sub-surface groups.