Estimating the location of a sound source using only the audio captured by an array of microphones has been an active area of research for nearly four decades. The problem is referred to as sound source localization (SSL). There are robust, elegant, and computationally efficient algorithms for SSL when there is only one source of sound. But in real-life situations, it is more than likely that two or more people speak at the same time, or there is noise from a projector while a speaker speaks.
