Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Adjacent ear
Patent
1994-08-25
1996-12-31
Brinich, Stephen
Electrical audio signal processing systems and devices
Acoustical noise or sound cancellation
Adjacent ear
381 94, G06F 1500
Patent
active
055902057
ABSTRACT:
An adaptive control system that can be used for active acoustic attenuation implements an LMS or an RLMS update using an error signal that is filtered through a delayed Hermitian transpose of a C model of an auxiliary path following an adaptive control filter. Adaptive on-line C modeling can be used effectively. The invention is useful in SISO and MIMO applications, and can reduce the number of filtering operations in systems using several reference signals. The invention does not require inverse C modeling.
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"Development of the Filtered-U Algorithm for Active Noise Control" L. J. Eriksson, Journal of Acoustic Society of America., 89(1), Jan., 1991, pp. 257-265.
Brinich Stephen
Digisonix, Inc.
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