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Convention Paper

Audio Forensic Gunshot Analysis and Multilateration

Authors: Maher, Robert C.; Hoerr, Ethan

AES Convention 145 · Paper 10100 · October 2018

Abstract

This paper considers the opportunities and challenges of acoustic multilateration in gunshot forensics cases. Audio forensic investigations involving gunshot sounds may consist of multiple simultaneous but unsynchronized recordings obtained in the vicinity of the shooting incident. The multiple recordings may provide information useful to the forensic investigation, such as the location and orientation of the firearm, and if multiple guns were present, addressing the common question “who shot first?” Sound source localization from multiple recordings typically employs time difference of arrival (TDOA) estimation and related principles known as multilateration. In theory, multilateration can provide a good estimate of the sound source location, but in practice acoustic echoes, refraction, diffraction, reverberation, noise, and spatial/temporal uncertainty can be confounding.

Details

Published in
AES Convention 145
AES Convention
145
Paper number
10100
Publication date
October 6, 2018
Session subject
Semantic Audio
Affiliation
Montana State University, Bozeman, MT, USA (See document for exact affiliation information.)
Type
Convention Paper