The principal aircraft and engine manufacturers in Europe are facing increasing pressure to reduce aircraft noise levels.
The objective of RESOUND is to acquire the technology necessary to support the design of derivative and new aero-engines with noise levels that are 4 dB quieter than those of aircraft currently entering service. This will provide the foundation for the achievement of a mid-term (8 years) objective of reducing aircraft noise levels by at least 6 dB, and allow European industry to compete on an equal footing with the US.

RESOUND addresses the challenge of reducing the noise at source, in particular turbomachinery noise, through

• engine component aero-acoustic design and
• novel noise controlling devices that can be integrated within the engine structure.

Innovative technologies are to be evaluated, with the aid of theoretical techniques and experiments at model and full scale.