Detection of gunshots using microphone array mounted on a moving platform

Detection of gunshots on a moving platform such as a vehicle is subjected to platform and flow-noise. Hence, detection of muzzle blast signal in the noise is extremely difficult. The received signal at a microphone consists of two parts: one due to direct path and other due to multipath. The signals due to multipath ride the noise and appear as fine fluctuations. In this paper we present a technique to detect the whereabouts of muzzle blast signal (due to direct path) buried in noise by first detecting the signals due to multipath. Once the muzzle blast is detected, the time difference of arrival (TDOA) at several pairs of microphones can be used to localize the origin of the gunshot.