Ducted Axial Fan (ANC) U.S. Patent 5,526,432Engineering Faculty Publications
AbstractA ducted axial fan for large diameter ducts (11) which includes equidistantly spaced sensors (22,23) upstream and downstream of an axial fan and spaced actuators (24, 26) located around the periphery of said duct to cancel tonal noise caused by the air turbulence generated by the rotation of the fan.
Published CitationDenenberg; Jeffrey N.. Ducted Axial Fan (ANC) U.S. Patent 5,526,432 issued June, 1996
Citation InformationJeffrey N. Denenberg. "Ducted Axial Fan (ANC) U.S. Patent 5,526,432" (1996)
Available at: http://works.bepress.com/jeffrey_denenberg/18/