SOUND SOURCE LOCALIZATION USING MICROPHONE ARRAY EMULATOR

摘要

In formal meetings or automatic speech recognition systems, noise free communication is always desirable. Sound source localization and the audio beam formation are the acoustic signal processing techniques developed for this purpose. These methods are based on array processing and they use microphone array as the signal capturing device. Beam formation algorithm boosts the signal only from desired direction while suppress noise from other direction. For this, it requires the knowledge about the direction of the sound source. Hence, sound source localization is a group of logical steps that are used to find the direction of the sound source by exploiting the time difference of arrival (TDOA) or phase differences between the signals coming at each pair of microphones. In this work, five different algorithms are used to find TDOA using a microphone array emulator. Then from the known delays and array geometry, the direction of source is obtained which can be provided to beam formation.