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Gunshot Airborne Surveillance with Rotary Wing UAV-Embedded Microphone Array.
Sensors (Basel) 2019; 19(19)S

Abstract

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.

Authors+Show Affiliations

Department of Electrical Engineering, Military Institute of Engineering (IME), Rio de Janeiro 22290-270, Brazil. felipe.serrenho@gmail.com.Department of Electrical Engineering, Military Institute of Engineering (IME), Rio de Janeiro 22290-270, Brazil.Department of Science and Industry Systems, University of South-Eastern Norway (USN), 3616 Kongsberg, Norway. antonio.ramos@usn.no.Program of Defense Engineering, Military Institute of Engineering (IME), Rio de Janeiro 22290-270, Brazil. rigelfernandes@gmail.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31581585

Citation

Serrenho, Felipe Gonçalves, et al. "Gunshot Airborne Surveillance With Rotary Wing UAV-Embedded Microphone Array." Sensors (Basel, Switzerland), vol. 19, no. 19, 2019.
Serrenho FG, Apolinário JA, Ramos ALL, et al. Gunshot Airborne Surveillance with Rotary Wing UAV-Embedded Microphone Array. Sensors (Basel). 2019;19(19).
Serrenho, F. G., Apolinário, J. A., Ramos, A. L. L., & Fernandes, R. P. (2019). Gunshot Airborne Surveillance with Rotary Wing UAV-Embedded Microphone Array. Sensors (Basel, Switzerland), 19(19), doi:10.3390/s19194271.
Serrenho FG, et al. Gunshot Airborne Surveillance With Rotary Wing UAV-Embedded Microphone Array. Sensors (Basel). 2019 Oct 1;19(19) PubMed PMID: 31581585.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Gunshot Airborne Surveillance with Rotary Wing UAV-Embedded Microphone Array. AU - Serrenho,Felipe Gonçalves, AU - Apolinário,José Antonio,Jr AU - Ramos,António Luiz Lopes, AU - Fernandes,Rigel Procópio, Y1 - 2019/10/01/ PY - 2019/08/23/received PY - 2019/09/19/revised PY - 2019/09/24/accepted PY - 2019/10/5/entrez PY - 2019/10/5/pubmed PY - 2019/10/5/medline KW - direction of arrival (DoA) estimation KW - gunshot audio surveillance KW - microphone array KW - rotary wing drones KW - shooter localization KW - unmanned aerial vehicles (UAV) JF - Sensors (Basel, Switzerland) JO - Sensors (Basel) VL - 19 IS - 19 N2 - 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. SN - 1424-8220 UR - https://www.unboundmedicine.com/medline/citation/31581585/Gunshot_Airborne_Surveillance_with_Rotary_Wing_UAV-Embedded_Microphone_Array L2 - http://www.mdpi.com/resolver?pii=s19194271 DB - PRIME DP - Unbound Medicine ER -