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    • Active control of aircraft engine inlet noise using compact sound sources and distributed error sensors 

      Center for Innovative Technology; Virginia Polytechnic Institute and State University; Virginia Tech Intellectual Properties, Inc.; Burdisso, Ricardo A.; Fuller, Chris R.; O'Brien, Walter F.; Thomas, Russell H.; Dungan, Mary E. (United States Patent and Trademark Office, 1996-05-07)
      An active noise control system using a compact sound source is effective to reduce aircraft engine duct noise. The fan noise from a turbofan engine is controlled using an adaptive filtered-x LMS algorithm. Single multi ...