Abstract
An active duct noise control system and method thereof are disclosed. The system includes a duct, a source loud speaker, a microphone, a plurality of control loud speakers and a plurality of controllers. The source loud speaker generates the primary noise and the microphone is disposed to receive the residual noise. The plurality of control loud speakers are disposed between the source loud speaker and the microphone, so that the audio frequencies generated by the plurality of control loud speakers can be used to reduce the primary noise. The plurality of controllers are connected to the plurality of control loud speakers and the source loud speaker. The audio frequencies generated by the plurality of control loud speakers are controlled by the plurality of controllers according to the multichannel inverse filtering principle.