Title

Ducted Axial Fan (ANC) U.S. Patent 5,526,432

Document Type

Patent

Publication Date

6-1996

Abstract

A 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.

Comments

U.S. Patent 5,526,432 issued June, 1996

Published Citation

Denenberg; Jeffrey N.. Ducted Axial Fan (ANC) U.S. Patent 5,526,432 issued June, 1996