A design of algorithm based on microphone array

To extract acoustical signal of the main speaker in noisy environment, a signal transmission model was established based on cross microphone array in this paper. According to the signal transmission model, the main speaker´s direction was estimated by utilizing improved MUSIC, and then using a spatial filtering method to track and pick up the main speaker´s voice through the microphone array. Experimental results show that it is feasible and reasonable to extract acoustical signal of the main speaker in noisy environment by using the novel method, and it is more accurately to estimate the direction of the desired signal. And after processed by the novel method, the desired signal´ SNR is enhanced and the interference signals are well suppressed.