Detail publikace

Short-Term Entropy of Signal Energy Used for Effective Detecting of Weak Gunshots in Noisy Environments

SIGMUND, M.

Originální název

Short-Term Entropy of Signal Energy Used for Effective Detecting of Weak Gunshots in Noisy Environments

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Conventional gunshot detection systems can quickly and reliably detect gunshots in the area where the acoustic sensors are placed. This paper presents the detection of weak hunting gunshots using the short-term entropy of signal energy computed from acoustic signals in an open natural environment. Our research in this field was primarily aimed at detecting gunshots fired at close range with the usual acoustic intensity to protect wild elephants from poachers. The detection of weak gunshots can extend existing detection systems to detect more distant gunshots. The developed algorithm was optimized for the detection of gunshots in two categories of the surrounding sounds, short impulsive events and continuous noise, and tested in acoustic scenes where the power ratios between the weak gunshots and louder surroundings range from 0 dB to -14 dB. The overall accuracy was evaluated in terms of recall and precision. Depending on impulsive or noise sounds, binary detection was successful down to -8 dB or -6 dB; then, the efficiency decreases, but some very weak gunshots can still be detected at -13 dB. Experiments show that the proposed method has the potential to improve the efficiency and reliability of gunshot detection systems.

Klíčová slova

gunshot detection; weak gunshots; short-term energy entropy; noisy environment; security and surveillance

Autoři

SIGMUND, M.

Vydáno

30. 7. 2024

Nakladatel

Multidisciplinary Digital Publishing Institute (MDPI)

Místo

Basel

ISSN

1424-8220

Periodikum

SENSORS

Ročník

24

Číslo

15

Stát

Švýcarská konfederace

Strany počet

17

URL

https://www.mdpi.com/1424-8220/24/15/4933

BibTex

@article{BUT189494,
  author="Milan {Sigmund}",
  title="Short-Term Entropy of Signal Energy Used for Effective Detecting of Weak Gunshots in Noisy Environments",
  journal="SENSORS",
  year="2024",
  volume="24",
  number="15",
  pages="17",
  doi="10.3390/s24154933",
  issn="1424-8220",
  url="https://www.mdpi.com/1424-8220/24/15/4933"
}