Acoustic firearm discharge detection and classification in an enclosed environment

Luzi, Lorenzo; Gonzalez, E. P.; Bruillard, Paul; Prowant, Matthew S.; Skorpik, James R.; Hughes, Michael S.; Child, Scott; Kist, Duane; McCarthy, John E.

doi:10.1121/1.4948994

Cited by 6 publications

(3 citation statements)

References 21 publications

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“…This will maximize drone detection while filtering out other acoustic sources. More details on these types of acoustic sources can be found in [49][50][51][52][53]. Figure 15a,b shows the typical acoustic signatures of pistol gunfire and a small fourrotor drone, respectively, measured with a broadband microphone (Piezotronics Model 378A21).…”

Section: Operation In Airmentioning

confidence: 99%

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Directional Resonant MEMS Acoustic Sensor and Associated Acoustic Vector Sensor

Ivancic,

Karunasiri,

Alves

2023

Sensors

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This paper reports on the design, modeling, analysis, and evaluation of a micro-electromechanical systems acoustic sensor and the novel design of an acoustic vector sensor array (AVS) which utilized this acoustic sensor. This research builds upon previous work conducted to develop a small, lightweight, portable system for the detection and location of quiet or distant acoustic sources of interest. This study also reports on the underwater operation of this sensor and AVS. Studies were conducted in the lab and in the field utilizing multiple acoustic sources (e.g., generated tones, gun shots, drones). The sensor operates at resonance, providing for high acoustic sensitivity and a high signal-to-noise ratio (SNR). The sensor demonstrated a maximum SNR of 88 dB with an associated sensitivity of −84.6 dB re 1 V/μPa (59 V/Pa). The sensor design can be adjusted to set a specified resonant frequency to align with a known acoustic signature of interest. The AVS demonstrated an unambiguous, 360-degree, in-plane, azimuthal coverage and was able to provide an acoustic direction of arrival to an average error of within 3.5° during field experiments. The results of this research demonstrate the potential usefulness of this sensor and AVS design for specific applications.

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Section: Operation In Airmentioning

confidence: 99%

“…This will maximize drone detection while filtering out other acoustic sources. More details on these types of acoustic sources can be found in [49][50][51][52][53].…”

Section: Operation In Airmentioning

confidence: 99%

Directional Resonant MEMS Acoustic Sensor and Associated Acoustic Vector Sensor

Ivancic,

Karunasiri,

Alves

2023

Sensors

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“…However, while shotguns and artillery report is considered to be just a noise, it can be in fact very informative. Acoustic signal of a firearm discharge can be detected and classified [3]. For example, Defense Technical Information Center published a study of the spectral content of small arms fire at varying distances [4].…”

Section: Introductionmentioning

confidence: 99%

Use of sound spectral signals analysis to assess the technical condition of mechanical devices

Maciąg

Chałko

2019

MATEC Web Conf.

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The article presents the results of a part of research conducted by the authors into a wide range of work on automation of public safety systems. Their main purpose is to create, on the basis of sound signals analysis, system of warning against the use of firearms monitored public places not only at the time of shooting, but at the stage of preparing - the firearm reloading process. The range of acoustic measurements presented in the article and their analyzes included variability of sound emission of selected type of firearms depending on the number of operations and thus the degree of wear. Analysis of the recorded data will allow in the future to develop a system enabling not only to determine a type of firearm or tp narrow down the search area of individual specimens, but also to determine the degree of wear in terms of suitability for further use. The results discussed in the article correspond to two states of the same firearm model. The first is the initial state from the manufacturer’s factory after returning 50 control shots, the other after over 20,000 cycles. The used firearm was technically fully efficient, with no need to replace the elements during operation as well as tests. The presented scope of measurements includes spectral analysis of sound in the near field and time analysis of sound emission levels in the successive operation phases of the firearm mechanisms.

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