Audio localization

Abstract

This report presents a method for localizing a sound source. The project is implemented to locate a sound source not visible to the naked eye. The source is localized using the TDOA (time delay of arrival) technique. The time delay of arrival technique calculates the delay of arrival of sound on to two microphones on an array and derives an angle from the delay calculation. The hardware consists of an array of two microphone being used at sampling rate of 192000 Hz to determine the general direction of sound by carrying out cross co-relation between both mics to find out TDOA. The project is intended to locate a gunshot or sniper in real time in the battlefield. The hardware was tested using intense sounds to replicate the gunshots as real gunshots could not be used. The hardware worked marvelously in noisy and reverberant environments. The angles calculated lay between +5 and -5 of the actual angles.