Aircraft cabin noise control apparatus
Method for actively attenuating engine generated noise Patent #: 5146505
ApplicationNo. 411785 filed on 06/30/1995
US Classes:381/71.3, From appliance381/71.5, Within duct415/119WITH SOUND OR VIBRATORY WAVE ABSORBING OR PREVENTING MEANS OR ARRANGEMENT
ExaminersPrimary: Isen, Forester W.
Foreign Patent References
International ClassG10K 011/16
AbstractA repetitive noise cancellation system for multiple noise sources employing a controller (36) which senses radiated noise by reference sensors (35) and the status of the noise sources by position sensors (37, 38) and automatically controls one of the noise sources so that the noises being emitted from the multiple sources cancel one another.