Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Counterwave generation control path
Patent
1996-06-26
1998-10-27
Chang, Vivian
Electrical audio signal processing systems and devices
Acoustical noise or sound cancellation
Counterwave generation control path
381 7112, H03B 2900
Patent
active
058287604
ABSTRACT:
An active noise (or vibration) control system having an actuator 24 which provides an acoustic anti-noise signal in response to an drive signal (U), an error sensor 16 which senses the acoustic anti-noise signal from the actuator, senses disturbance noise (d), and provides an error signal (e) indicative of a combination thereof, and a controller 20, responsive to the error signal (e), which provides the drive signal (U) to the actuator 24, is provided with controller compensation 78 having energy states 112 and having non-linear reset logic 130 which temporarily resets the energy states 112 in the filter 78 to zero when the error signal crosses zero, thereby improving the bandwidth of the active noise control system.
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Jacobson Clas A.
McCormick Duane C.
Chang Vivian
DePardo Gerald L.
United Technologies Corporation
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