SELENE
SELENE (Sound Exposure Level starting from Evaluation of Noise Emissions) is a noise prediction toolchain for helicopters. It is used for prediction of helicopter flyover and approach noise. SELENE uses a database of noise hemispheres for the description of noise directivity and level as a function of the flight condition. This database can be obtained by dedicated flight experiments or by numerical simulation. Noise is propagated from the hemisphere to observer locations using either propagation in a still atmosphere or by ray tracing, to incorporate atmospheric effects such as wind and/or temperature gradients. SELENE is combined with optimisation algorithms allowing for optimising helicopter flight trajectories for minimal noise impact on the ground.
Key features
- Prediction of the noise carpet of helicopters
- Optimisation of noise abatement flight procedures
- Consideration of atmospheric conditions, such as wind and temperature stratification, on sound propagation
Areas of application
The toolchain SELENE has been applied in several EU and DLR internal projects. Mainly for the optimisation of approach procedures for helicopters. For example, in the EU project CleanSky, the tool chain was used to optimise an approach procedure for a real airport. The optimised procedure was successfully verified by flight test with noise measurements on the ground.
License notice
Access to these software products can only be granted if the organization you are representing holds a valid license or your organization is interested in signing such a license. If either of the aforementioned two points are fulfilled please get in touch with us providing additional information. Afterwards, we will support you in getting access to our software products. Please note, that we are, in general, not signing license agreements with private individuals.