GUNSHOT DIRECTION OF ARRIVAL DETERMINATION USING BIO-INSPIRED MEMS SENSORS

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Authors
Soule, Ionatan A.
Subjects
Ormia Ochracea
fly
angle of arrival
AOA
direction of arrival
DoA
gunshot
microelectromechanical system
MEMS
acoustic
detection
direction
bio-inspired
biomimetic
arctan estimator
Advisors
Karunasiri, Gamani
Durante Pereira Alves, Fabio
Date of Issue
2022-06
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
A key component of battle space awareness is direction of arrival (DoA) determination of gunshots. In the initial stages of an engagement, quick and reliable DoA determination enhances a Marine’s ability to execute the observe-orient-decide-act (OODA) loop, increasing chances of survival and mission success. Naval Postgraduate School (NPS) has developed a novel, biomimetic acoustic sensor modeled after the auditory system of the Ormia Ochracea fly. This microelectromechanical system (MEMS)-based directional sound sensor, which consists of two wings connected to a substrate using two torsional legs in the middle, is well documented in previous NPS theses. Each sensor has a uniform dipole beam pattern. By combining two crossed MEMS sensors (crossed-dipoles) with an omni-directional microphone, 360° DoA determination can be fully resolved. The objective of this thesis is to evaluate, optimize, and develop DoA estimators for gunshots in the time- and frequency-domain, specifically for the crossed-dipoles sensors plus an omni-directional microphone configuration.
Type
Thesis
Description
Department
Physics (PH)
Organization
Identifiers
NPS Report Number
Sponsors
ONR, Arlington, VA 22203
Funder
Format
Citation
Distribution Statement
Approved for public release. Distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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