Applying PDC for the Recognition of Firearm's Calibre

Abstract

Nowadays, there has been an enormous increase in audio recordings, some of these of the interest of audio forensics. Audio forensics has been used in many different ways for recognising firearm's calibres. In this work, we use Partial Directed Coherence (PDC) on recordings of capsules hitting the ground to recognise the firearm's calibre. Six different calibres were recorded in a controlled environment, and these audios were cut to have the same size. These audios were analysed using PDC. The results show that the audios of the calibres are orthogonal; thus, for this experiment being impossible to get a false positive while using the proposed methodology.