Turbomachinery noise radiated from the bypass and core nozzles is becoming the dominant noise source on modern aircraft. Recent EU research programmes have made significant progress in reducing both the generation of turbomachinery noise and its radiation from the intake. But little work has been conducted on reducing the radiation of turbomachinery noise from exhaust nozzles. TURNEX will address this shortfall by delivering improved understanding and validated design methods, and by evaluating a number of low-noise nozzle configurations aimed at a 2 - 3 dB source noise reduction. To achieve that goal, TURNEX will exploit the noise technology and methodology acquired in EC funded projects and national programmes. Thus, TURNEX has four focussed objectives. First, innovative noise reduction concepts will be tested experimentally at model scale. Second, computational prediction methods for turbomachinery noise radiation through the engine exhaust will be improved and validated. Third, a parametric study of real geometry/flow effects and noise reduction concepts as applied to current and future aircraft configurations will be conducted. Fourth, the relative merits of different approaches to testing fan rigs in European noise facilities will be assessed technically.