Technical Note: Airfield Noise

Aircraft noise mapping in real time

FLIGHT-X has a complete aircraft flight noise and acoustics simulation capability. It can simulate realistic airfields with built-in topography and can visualise the effects on the ground of multiple aircraft movements, an example of which is shown in the graph below.

Real-time noise metrics (sound pressure level, A-weighted noise level, noise onset rate, and other instantaneous noise metrics) are stored over the entire flight operation and for the complete airfield, which can be modelled with a grid the size of the airplane itself. Visualisation of noise metrics is done with post-processing techniques. It is interesting to see which areas of the airfield are affected, by how much, and how fast. These composite metrics can be aggregated to provide integral metrics such as EPNL, SEL and LEQ. It would not be possible to execute this level of simulation with engineering practice programs used at some airports.

Watch a video clip of these operations.

You may also be interested in cruise noise.

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