This paper describes a novel method for multiple sound source localization and its performance evaluation in actual room environments. The proposed method localizes a sound source by finding the position that maximizes the accumulated correlation coefficient between multiple channel pairs. After the estimation of the first sound source, a typical pattern of the accumulated correlation for a single sound source is subtracted from the observed distribution of the accumulated correlation. Subsequently, the second sound source is searched again. To evaluate the effectiveness of the proposed method, experiments of multiple sound source localization were carried out in an actual office room. The result shows that multiple sound source localization accuracy is about 99.7%. The proposed method could realize the multiple sound source localization robustly and stably.
Bibliographic reference. Cho, Kook / Nishiura, Takanobu / Yamashita, Yoichi (2009): "A study on multiple sound source localization with a distributed microphone system", In INTERSPEECH-2009, 1359-1362.