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Advancing Forensic Analysis of Gunshot Acoustics

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This paper describes our current work to create the apparatus and methodology for scientific and repeatable collection of firearm acoustical properties, including the important direction-dependence of each firearm’s sound field. Gunshot acoustical data is collected for a wide range of firearms using an elevated shooting platform and an elevated spatial array of microphones to allow echo-free directional recordings of each firearm’s muzzle blast. The results of this proposed methodology include a standard procedure for cataloging firearm acoustical characteristics and a database of acoustical signatures as a function of azimuth for a variety of common firearms and types of ammunition.

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AES - Audio Engineering Society