Patent ID: 6295363
Filing Date: 2001-09-25
Classification: G10K

Abstract:
An adaptive passive acoustic attenuation system that attenuates an acoustic disturbance in an acoustic plant comprising:multiple banks of adjustable tuners communicating acoustically with the acoustic plant, each adjustable tuner having passive acoustical characteristics determined in accordance with passive parameter settings;an error sensor that senses an acoustic disturbance in the acoustic plant and generates an error signal in response thereto;an electronic controller that receives the error signal from the error sensor and outputs correction signals to selectively adjust the passive parameter settings of the adjustable tuners;means for adapting the system which comprises contemporaneously adjusting the passive parameter settings for all of the tuners in one of the banks to vary the acoustic disturbance sensed by the error sensor while the tuners in the other banks remain stationary;means for determining whether each adjustable tuner is fully operational; andmeans for deactivating adjustment of any adjustable tuner in the system that is not fully operational.