Wavelet based shock wave and muzzle blast classification for different supersonic projectiles

Libal, Urszula; Spyra, Krystian

doi:10.1016/j.eswa.2014.02.037

Cited by 18 publications

(8 citation statements)

References 14 publications

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“…Preliminary tests suggest that the pressure integrated with time over the first peak of the Mach wave features less shot-to-shot variations. Filtering of Mach wave reflections is an area of investigation [19]. Last, our results suggest that the transverse coherence length is smaller than the inter-distance between our microphones.…”

Section: Summary and Discussionmentioning

confidence: 61%

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Sensitivity of shot detection and localization to environmental propagation

Cheinet

Broglin

2015

Applied Acoustics

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Section: Summary and Discussionmentioning

confidence: 61%

“…The approximation l p = 4d p is considered, in lines with a common practice [21,19]. Whereas standard projectiles may feature proportionality coefficients up to 8, the dependence in bullet's shape is of second order in these equations [29,15].…”

Section: Range Estimation Algorithmmentioning

confidence: 99%

Sensitivity of shot detection and localization to environmental propagation

Cheinet

Broglin

2015

Applied Acoustics

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“…As previously noted, a gunshot surveillance system must be able to detect an impulsive signal and to identify if it is a muzzle blast component, a shockwave component, or none of them. There is a vast literature available about this matter [41,42,43,44,45,46].…”

Section: Doa Estimation and Shooter Localizationmentioning

confidence: 99%

Gunshot Airborne Surveillance with Rotary Wing UAV-Embedded Microphone Array

Serrenho

Apolinario

Ramos

et al. 2019

Sensors

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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.

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“…The US Army's Ballistic Research Laboratory (BRL) has developed a prediction method for muzzle devices [32] based on gathered experimental data on muzzle devices for distances from 10 to 50 calibers from the muzzle [33][34][35]. Helliker and other scientists [16,27,[36][37][38][39][40][41][42] investigated many different muzzle devices including a silencer. The outputs of the models were not verified against experimental test data from muzzle blasts, which differ to conventional blast waves [43][44][45][46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Force and Sound Pressure Sensors Used for Modeling the Impact of the Firearm with a Suppressor

et al. 2020

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In this paper, a mathematical model for projectiles shooting in any direction based on sensors distributed stereoscopically is put forward. It is based on the characteristics of a shock wave around a supersonic projectile and acoustical localization. Wave equations for an acoustic monopole point source of a directed effect used for physical interpretation of pressure as an acoustic phenomenon. Simulation and measurements of novel versatile mechanical and acoustical damping system (silencer), which has both a muzzle break and silencer properties studied in this paper. The use of the proposed damping system can have great influence on the acoustic pressure field intensity from the shooter. A silencer regarded as an acoustic transducer and multi-holes waveguide with a chamber. Wave equations for an acoustic monopole point source of a directed effect used for the physical interpretation of pressure as an acoustic phenomenon. The numerical simulation results of the silencer with different configurations presented allow trends to be established. A measurement chain was used to compare the simulation results with the experimental ones. The modeling and experimental results showed an increase in silencer chamber volume results in a reduction of recorded pressure within the silencer chamber.

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Wavelet based shock wave and muzzle blast classification for different supersonic projectiles

Cited by 18 publications

References 14 publications

Sensitivity of shot detection and localization to environmental propagation

Sensitivity of shot detection and localization to environmental propagation

Gunshot Airborne Surveillance with Rotary Wing UAV-Embedded Microphone Array

Force and Sound Pressure Sensors Used for Modeling the Impact of the Firearm with a Suppressor

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