Sensitivity of shot detection and localization to environmental propagation

Cheinet, Sylvain; Broglin, Th.

doi:10.1016/j.apacoust.2015.01.021

Cited by 9 publications

(2 citation statements)

References 30 publications

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“…According to Ishimaru (1978), these kinds of media vary in time and space, making sound amplitude and phase to fluctuate randomly. For a fixed source/receptor configuration, atmospheric turbulence may also cause signal variability between different emissions, as recently observed by Cheinet and Broglin (2015).…”

Section: Feature Extractionmentioning

confidence: 85%

Impulsive Sound Detection Directly in Sigma-Delta Domain

Miranda¹,

Lima²

2017

Archives of Acoustics

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Recent implementations of Sigma-Delta (Σ∆) converters have achieved low cost, low power consumption, and high integration while maintaining resolution as high as in Nyquist-rate converters. However, its usage implies demodulating the source signal delivered from Σ∆ modulation to Pulse-Code Modulation (PCM) on a pre-processing stage. This work proposes an algorithm based on Discrete Cosine Transform for impulsive signal detection to be applied directly on a modulated Σ∆ bitstream, targeting to reduce computational cost in acoustic event detection applications such as gunshot recognition systems. From pre-recorded impulsive sounds in Σ∆ format, it has been shown that the new method presents a similar error rate in comparison with traditional energy-based approaches in PCM, meanwhile, it reduces significantly the number of operations per unit time.

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Section: Feature Extractionmentioning

confidence: 85%

Impulsive Sound Detection Directly in Sigma-Delta Domain

Miranda¹,

Lima²

2017

Archives of Acoustics

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“…Localization of multiple impulse acoustic sources is of great interest for gunshot, mortar, artillery, sniper, firecracker and explosion detection localization in civil environments as well as in military battlefield monitoring systems [1][2][3][4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Method for Direct Localization of Multiple Impulse Acoustic Sources in Outdoor Environment

et al. 2022

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A method for the direct outdoor localization of multiple impulse acoustic sources by a distributed microphone array is proposed. This localization problem is of great interest for gunshot, firecracker and explosion detection localization in a civil environment, as well as for gun, mortar, small arms, artillery, sniper detection localization in military battlefield monitoring systems. Such a kind of localization is a complicated technical problem in many aspects. In such a scenario, the permutation of impulse arrivals on distributed microphones occurs, so the application of classical two-step localization methods, such as time-of-arrival (TOA), time-difference-of-arrival (TDOA), angle-of-arrival (AOA), fingerprint methods, etc., is faced with the so-called association problem, which is difficult to solve. The association problem does not exist in the proposed method for direct (one-step) localization, so the proposed method is more suitable for localization in a given acoustic scenario than the mentioned two-step localization methods. Furthermore, in the proposed method, direct localization is performed impulse by impulse. The observation interval used for the localization could not be arbitrarily chosen; it is limited by the duration of impulses. In the mathematical model formulated in the paper, atmospheric factors in acoustic signal propagation (temperature, pressure, etc.) are included. The results of simulations show that by using the proposed method, centimeter localization accuracy can be achieved.

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Important aspects of an acoustic location system designed to operate in marine environment

Grzywiński

2021

Applied Acoustics

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Sensitivity of shot detection and localization to environmental propagation

Cited by 9 publications

References 30 publications

Impulsive Sound Detection Directly in Sigma-Delta Domain

Impulsive Sound Detection Directly in Sigma-Delta Domain

Method for Direct Localization of Multiple Impulse Acoustic Sources in Outdoor Environment

Important aspects of an acoustic location system designed to operate in marine environment

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