Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Counterwave generation control path
Patent
1995-08-21
1998-02-03
Kuntz, Curtis
Electrical audio signal processing systems and devices
Acoustical noise or sound cancellation
Counterwave generation control path
381 7111, H03B 2900
Patent
active
057153205
ABSTRACT:
An active adaptive control system introduces a control signal from an output transducer (14) to combine with the system input signal (6) and yield a system output signal (8). An error transducer (16) senses the system output signal and provides an error signal (44). An adaptive filter model (40) has a model input from a reference signal (42) correlated to the system input signal, and an output outputting a correction signal (46) to the output transducer to introduce the control signal. Performance of the model is selectively controlled to control the signal sent to the output transducer. Various monitoring and control methods are provided, including spectral leak signal monitoring and control, correction signal monitoring and control, frequency responsive spectral transfer function processing of the leak signal and/or the correction signal, reference signal processing, and fuzzy logic control.
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Allie Mark C.
Brokish Charles W.
Eriksson Larry J.
Chang Vivian
Digisonix, Inc.
Kuntz Curtis
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