Active word boundary detection using three microphones

A new active word boundary detection algorithm for speech is investigated in this paper. In this algorithm three microphones are used to detect the desired and undesired periods of speech by defining a geometrical 'active zone'. With three microphones this word boundary detector can retrieve the desired speech embedded with noise from varieties of noisy background. Some simulation experiments are conducted in this paper to show that the algorithm is an effective speech detecting method that exceeds an average 80% success rate.