Adaptive tonal control system with constrained output and...

Details Adaptive tonal control system with constrained output and... Adaptive tonal control system with constrained output and...

H - Electricity

03

H

H03H 7/01 (2006.01) G10K 11/178 (2006.01)

Patent

CA 2166500

An adaptive control system and method for actively canceling tones in an active acoustic attenuation system has an adaptive parameter bank. Adaptation of the adaptive parameter bank can be constrained with respect to the null space of a C model of an auxiliary path (e.g. speaker-error). Alternatively, output from the adaptive parameter bank can be constrained with respect to the effective null space of the C model. The preferred system uses singular value decomposition, normalization, and demodulation to implement the methods of constraining output and adaptation. The invention can eliminate stability and tracking problems associated with over-parameterization.

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