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Noise reduction

Our main pages on this subject:

1.Clients and Partners - Onera
 Leader of the Iroqua aircraft noise reduction initiative, bringing together Onera, CNRS (French national scientific research agency), Airbus, Dassault Aviation, Eurocopter and Snecma....
 
2.Prédiction et réduction des nuisances sonors de rotor et d'hélice - Offre technologique Onera
 Noise, Noise reduction, Rotorcraft, Windmill, Propellers, Heliport, Land use planning....
 
3.Optimisation " aéroacoustique / performance " des hélices et des moteurs - Offre technologique Onera
 Design of optimised aircraft propellers and rotors - noise reduction / performance.... Noise reduction, Performance, Multidisciplinary optimisation, Rotorcraft, Helicopter, Tilt-rotor, UAV, Rotor, Propeller....
 
4.Prediction and Reduction of Rotor and Propeller Noise Pollution - Onera's Technological Offer
 Noise, Noise reduction, Rotorcraft, Windmill, Propellers, Heliport, Land use planning....
 
5.A Strong Expertise in Turbofan Aeroacoustics - Onera's Technological Offer
 Engines, Turbofans, Nacelles, Noise reduction, Fan noise sources, Fan performances, Acoustic propagation in ducted fans....
 
6.Aero-Acoustic / Performance Optimisation of 3D Propellers and Rotors - Onera's Technological Offer
 Design of optimised aircraft propellers and rotors - noise reduction / performance.... Noise reduction, Performance, Multidisciplinary optimisation, Rotorcraft, Helicopter, Tilt-rotor, UAV, Rotor, Propeller....
 
7.Aero-Thermo-Acoustic Bench (B2A) : Liners Absorption Performance Measurements - Onera's Technological Offer
 LDV, Acoustic Impedance, Acoustic Intensity, In-Flow Acoustic Measurements, Aeronautic Liner, Noise Reduction, High-Temperature Acoustic Absorptive Materials....
 
8.Light aviation - Success of the flight tests for the Anibal " silent " propeller
 They confirm the noise reduction predictions of Onera engineers.... It boasts a noise reduction capacity of 8 decibels and offers an efficiency that is comparable to current metal two-blade propellers, at an acceptable production cost....
 
9.ONERA - Computational Fluid Dynamics and Aeroacoustics (DSNA) - References
 Aerodynamic and acoustic characterization of a hot supersonic jet that has led, in particular, to the definition of a noise reduction mechanism using water injection that is now used on the Ariane 5 ELA3 launch pad at Kourou....
 
10.Helicopters (HELI2)
 Less Noise from Helicopters !Basic Research on Helicopter Noise Reduction. Calculated main rotor noise during descent. A " quiet " rotor is being manufactured and a model will soon be tested in a wind tunnel (ERATO French-German programme).... The target is a 6 dBA noise reduction during descent.. Some of the Scientific Experts :.
 

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