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US 2004/0175004 A1Published application
Error signal processing to reduce spectral overlap in an active noise control system
OwnerManish Vaishyainventor
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Abstract
An active noise control system (20) includes a controller (34) having an error signal processing module (38). The controller (34) updates a value of an adaptive filter (40) based upon an averaged error signal (56). A convergence factor (58) used in a least mean square update equation (60) can be selected independent of an averaging parameter τE, which allows for faster convergence without the otherwise associated instability.
Claims20
A method of processing an error signal in an active noise control system, comprising:
- determining an average value of the error signal;
- and
- updating an adaptive filter value using the determined average error signal value.
An active noise control system, comprising:
- a controller that determines an average value of an error signal and then updates an adaptive filter value using the determined average error signal.
A method of updating an adaptive filter value in an active noise control system comprising:
- obtaining a relevant component of an error signal separately from updating the adaptive filter value based upon the error signal magnitude.
Dependencies are inferred from the claim text.