Omnidirectional sound source tracking based on sequential updating histogram

In this paper, a method for omnidirectional sound source tracking using a circular microphone array is proposed. The sequential updating histogram estimated every two microphones are integrated for the sound source tracking. The histogram is estimated by weighting those reliability to results obtained every adjacent microphone pair. In addition, the wrapped Cauchy distribution is used to detect the omnidirectional DOA. As a result, the accurate omnidirectional sound source tracking can be achieved. Several experimental results are shown to present the effectiveness of the proposed method.