A device for reducing engine exhaust noise in an aircraft engine includes
a number of oscillating jets which direct an oscillating flow into the
engine exhaust. The oscillating jets are connected via channels to a
turbomachinery source of high pressure gas, where the source is located
upstream from the engine exhaust portion. The high pressure gas passes
through the oscillating jets, which have a nozzle with a triangular
shaped orifice and an exhaust pipe, and exits the oscillating jets having
a oscillating flow. The oscillating flow mixes with the engine exhaust
thus reducing the noise created by the engine exhaust.