Characteristics of convergence and arrangement of fictional sources in adaptive array using multiple fictional sources

摘要

Adaptive microphone array techniques have been studied for noise reduction in teleconference systems. However, conventional methods have problems that are degradation of desired sound and increase of noise level, when the desired source moved. We proposed a new method that constrains sensitivity of the sound acquisition zone using multiple fictional sources. The characteristics of convergence and the arrangement of the fictional sources to make a sound acquisition zone, is clarified. Computer simulations show that the proposed method is effective in moving source.