A model-based approach to active noise cancellation using loudspeaker array

This paper presents a new model-based adaptive noise cancellation system using a loudspeaker array and an error sensor array which can be used to reduce the noise in a specific three-dimensional region. First, open loop system transfer functions are designed using a theoretical propagation model. The transfer functions thus found are regarded as the nominal values for the complete system. Second, to compensate for deviations from the theoretical model, the transfer functions are adapted using error measures from the error sensor array by the LMS algorithm. Computer simulation results shows that our approach is effective for noise reduction in 3-D space. Experiments using real-time active noise control hardware also confirms the performance of the system