Gunshot Airborne Surveillance with Rotary Wing UAV-Embedded Microphone Array
| Autor: | Jose A. Apolinario, Antonio L. L. Ramos, Felipe G. Serrenho, Rigel Procópio Fernandes |
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| Rok vydání: | 2019 |
| Předmět: |
Microphone array
Computer science direction of arrival (DoA) estimation 02 engineering and technology lcsh:Chemical technology 01 natural sciences Biochemistry Article Analytical Chemistry microphone array unmanned aerial vehicles (UAV) 0202 electrical engineering electronic engineering information engineering Computer vision lcsh:TP1-1185 Electrical and Electronic Engineering Instrumentation Muzzle shooter localization Audio signal gunshot audio surveillance business.industry 010401 analytical chemistry 020206 networking & telecommunications Bearing (navigation) Atomic and Molecular Physics and Optics Drone 0104 chemical sciences Muzzle flash Artificial intelligence Noise (video) rotary wing drones business |
| Zdroj: | Sensors (Basel, Switzerland) Sensors, Vol 19, Iss 19, p 4271 (2019) Sensors Volume 19 Issue 19 |
| ISSN: | 1424-8220 |
| Popis: | Unmanned aerial vehicles (UAV) are growing in popularity, and recent technological advances are fostering the development of new applications for these devices. This paper discusses the use of aerial drones as a platform for deploying a gunshot surveillance system based on an array of microphones. Notwithstanding the difficulties associated with the inherent additive noise from the rotating propellers, this application brings an important advantage: the possibility of estimating the shooter position solely based on the muzzle blast sound, with the support of a digital map of the terrain. This work focuses on direction-of-arrival (DoA) estimation methods applied to audio signals obtained from a microphone array aboard a flying drone. We investigate preprocessing and different DoA estimation techniques in order to obtain the setup that performs better for the application at hand. We use a combination of simulated and actual gunshot signals recorded using a microphone array mounted on a UAV. One of the key insights resulting from the field recordings is the importance of drone positioning, whereby all gunshots recorded in a region outside a cone open from the gun muzzle presented a hit rate close to 96%. Based on experimental results, we claim that reliable bearing estimates can be achieved using a microphone array mounted on a drone. |
| Databáze: | OpenAIRE |
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