Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Counterwave generation control path
Reexamination Certificate
2003-07-16
2008-03-11
Chin, Vivian (Department: 2615)
Electrical audio signal processing systems and devices
Acoustical noise or sound cancellation
Counterwave generation control path
C381S071100, C381S071800, C381S071110
Reexamination Certificate
active
07343016
ABSTRACT:
A method for noninvasive on-line secondary path modeling for the filtered-X LMS algorithm actively controls periodic noise. The method, based in the frequency domain, uses the concept of linear independence of two equations/two unknowns to arrive at the secondary path estimate. Linear independence of the two equations is achieved by adjusting the control filter output via the filter coefficients prior to the acquisition of the second set of data corresponding to the second equation.
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Chin Vivian
Faulk Devona E
Ohlandt Greeley Ruggiero & Perle L.L.P.
The Penn State Research Foundation
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