Reducing the noise generated by aircraft is still a major concern, and is in fact one of the primary goals of Acare and Clean Sky.
All of Safran’s aviation businesses are deploying considerable efforts to reduce noise, in line with the targets set by Acare (Advisory Council for Aeronautics Research in Europe). Nor has Safran forgotten that one of the primary advantages of the CFM56 turbofan when it hit the market was that it was significantly quieter than its competitors. That’s why seeking innovative solutions to reduce noise is still a strategic objective in our Group.
In Europe, Safran has led several acoustic research programs, including the latest “Openair”. On the domestic front, a new program dubbed “Rebecca” (the French acronym for “reducing aircraft engine noise via advanced technology concepts”) is seeking to develop active processing techniques, based on the principle of using one noise to “cancel” another.
Equipment-generated noise
Given the impressive progress in reducing engine noise, the noise generated by various aircraft equipment (engine nacelles and landing gear in particular) is taking on increasing importance and harbors considerable room for improvement. For example, the relative silence of the Airbus A380 is largely due to acoustic optimization work by nacelle manufacturer Aircelle. During final approach, the landing gear can generate a full third of the noise produced by the aircraft. In fact, the landing gear are not very aerodynamic, and even help slow down the plane when coming in for a landing. Different areas of possible improvement include the layout of pipes around the landing gear, installing fairings around the wheels, or positioning the doors so they can be used as deflectors.
Most viewed pages
Flux RSS: 
How does it work ?
See how our products work.