A Comprehensive simulation of factors that affect performance of array based acoustic gunshot localization on helicopters

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2016

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Yılmaz, Murat

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Self-defense solutions on current aircraft usually handle advanced weapons while most helicopters down or damaged are known to be attacked from ground using rifles or Rocket-Propelled Grenades (RPG). Although there are ground based localization solutions for Small Arms Fire (SAF) attacks, there are only a few implementations of onboard applications. A simple Acoustic Source Localization (ASL) application employs a microphone array for collecting audio signals, so as to locate sound sources using the measurements from the sound field. The aim of this study is to investigate the possibility of Acoustic Gunshot Localization on a helicopter so as to detect and localize SAF attacks, by simulating the effects of both wave propagation and signal processing parameters for different localization algorithms. Pre-processing and post-processing for each individual algorithm were also proposed considering domain specific issues, such as the effects of helicopter noise, environmental factors (temperature and humidity), gunshot signal characteristics and real life mission requirements.

Subject Keywords

Helicopters., Acoustic localization., Microphone arrays., Signal processing.

URI

http://etd.lib.metu.edu.tr/upload/12619814/index.pdf
https://hdl.handle.net/11511/25491

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Graduate School of Informatics, Thesis

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Citation Formats

M. Yılmaz, “A Comprehensive simulation of factors that affect performance of array based acoustic gunshot localization on helicopters,” M.S. - Master of Science, Middle East Technical University, 2016.