A system for reducing jet noise emission from an internally mixed gas turbine engine exhaust, comprising a fan/core flow mixer (15) having a plurality of mixer lobes (17) and a common flow nozzle (30) having an equal number of tabs (32) located along a circumferential edge of an aft end of the nozzle (30). There is a predetermined clocking relationship between the plurality of mixer lobes (17) and the plurality of nozzle tabs (32) that results in reduced exhaust noise emission, most evident in the lower frequency range.
