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Determining the Source Location of Gunshots From Digital Recordings

Digital recordings, in the form of photographs, audio, or video play an important evidentiary role in the criminal justice system. One type of audio recording that experts in acoustic forensics may encounter are those produced by the ShotSpotter Respond gunshot location system. This technical note introduces open-source software for extracting the location and timing metadata stored in these recordings and for performing acoustic multilateration on a set of time differences of arrival determined from ShotSpotter WAV files or any other digital audio file for which sufficiently accurate timing and location metadata are available. The process of determining the source location of a gunshot from three or more digital recordings is further explained via a set of worked examples, including a simple single-shot incident and an incident in which seven shots were fired from a moving vehicle.

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Express Paper 18; AES Convention 153; October 2022
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