The application of adaptive filtering to the active control of sound and vibration

The results of a preliminary investigation into the application of adaptive filtering to such multichannel active control systems are given. A review of the techniques used for single channel cancellation and their application to active control are presented. An algorithm which was developed to extend such methods into multichannel applications is introduced and some of its properties are discussed. It was concluded that the careful application of adaptive filtering concepts to the problems of active control can be very fruitful.