Correlated active attenuation system with error and...

Details Correlated active attenuation system with error and... Correlated active attenuation system with error and...

G - Physics

10

K

G10K 11/178 (2006.01)

Patent

CA 2082086

An active acoustic attenuation system atten- uates a correlated input acoustic wave and eliminates the need for an input transducer sensing such wave. An output transducer introduces a canceling acoustic wave to attenuate the input acoustic wave and yield an attenuated output acoustic wave. An error transducer senses the output acoustic wave and provides an error signal. An adaptive filter model has a model input, a model output outputting a correction signal to the output transducer to introduce the canceling acoustic wave, and an error input from the error transducer. A summer has a first input from the model output, a second input from the error transducer, and an output outputting a resultant sum to the model input, such that the model input is provided by the sum of the correction signal and the error signal.

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