Ford Global Technolgoies, LLC

Virginia Tech Intellectual Properties Inc

Jerome Peter Smith

Ricardo A Burdisso

Christopher R Fuller

Keng D Hsueh

Garland Lee

Julien Maillard

Larry Duane Hollingsworth

An extracting assembly for extracting a component signal generated by a component source from a composite signal is disclosed wherein a reference sensor generates a reference signal relating to activity of the component source, a composite sensor senses the composite signal, an adaptive filter is operatively connected to the reference sensor and the composite sensor to filter the component signal from the composite signal as a function of the reference signal generated by the reference sensor, and a normalizer operatively connected to the adaptive filter for normalizing the step size of each iteration taken by the adaptive filter to minimize the time to adapt the adaptive filter to transform the reference signal into the component signal.

Method and apparatus for extracting a component signal from a composite signal

An array of adaptive or fixed Herschel-Quincke tubes aligned in a circumferential or helical array about an inlet of a turbofan engine. The array of tubes effectively divide the acoustic energy generated by the engine. One of the energy components propagates within the tubes while the other propagates within the engine compartment. At some time certain, the acoustic energy in the tubes is reintroduced into the engine compartment to cancel the acoustic energy remaining in the engine as it propagates from the fan towards the inlet and outlet openings.

Fan noise reduction from turbofan engines using adaptive

Growing community of inventors

Blacksburg, VA, United States of America

Jerome Peter Smith