Aircraft Noise Analyses

Aircraft noise is one of the major environmental impacts caused by global air traffic. The general public and the media always pay special attention to this issue, which is why airport expansion and new construction projects always entail potential for dispute and court decisions. Aircraft noise is mainly generated by the engines and airflow around aircraft components. Noise pollution in the vicinity of airports is particularly pronounced due to the low flight altitudes during takeoff and landing and the additional flow of air around extended landing gears and lift devices.

In this context, GfL carries out noise calculations according to national and European specifications in accordance with 

Implementation of flight routes at Zurich Airport within the aircraft noise software IMMI

The IMMI software package from the manufacturer Wölfel Engineering, certified by the Federal Environment Agency (UBA), is used for this purpose. The aircraft noise prognosis module allows the following general analysis and evaluation steps:

  • Calculation of equivalent continuous noise levels and other noise-relevant parameters,
  • consideration of the individual airport infrastructure, flight route structure and aircraft characteristics in accordance with the data acquisition system (DES) within the framework of the guidance for data acquisition on flight operations (AzD), and
  • creation of noise contours and designation of appropriate noise protection zones.

On this basis, the assessment of noise pollution in cities and municipalities is carried out. In addition, air traffic operation / air traffic control procedures and various approach and departure routes can be evaluated with regard to the resulting noise emissions and, if necessary, optimized.