QUIET JET DISCHARGE NOZZLE

摘要

An improved air/gas jet nozzle of multiple orifice form is disclosed, the output of which is substantially inaudible to the human ear. The nozzle comprises an airfoil-shaped plenum having discharge orifices in its trailing edge. Sheaths of inaudible range vibrating air are induced to surround the discharge streams from the nozzle orifices and mask the audible range sound therein.