Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Adjacent ear
Patent
1991-11-15
1993-06-01
Ng, Jin F.
Electrical audio signal processing systems and devices
Acoustical noise or sound cancellation
Adjacent ear
381 94, H03B 2900
Patent
active
052167224
ABSTRACT:
A multi-channel active acoustic attenuation system for attenuating a correlated input acoustic wave has one or more output transducers introducing one or more respective canceling acoustic waves to attenuate the input acoustic wave and yield an attenuated output acoustic wave, one or more error transducers sensing the output acoustic wave and providing one or more error signals, and a plurality of adaptive filter channel models. Each channel model has a model input from a respective error transducer. One or more of the channel models also has a model input from at least one of the remaining channel models. Each channel model has an error input from one or more of the error transducers. Each channel model has a model output outputting a correction signal to a respective output transducer to introduce the respective canceling acoustic wave. The correction signal from one or more of the model outputs is also input to the model input of one or more of the remaining channel models.
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Lefkowitz Edward
Nelson Industries Inc.
Ng Jin F.
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