Aircraft Noise Monitoring
Fraport has also expanded the system of noise monitoring to record the new circumstances after the opening of the northwest runway. In September 2011, the network of measuring stations was increased by two additional measuring stations. The new measuring stations are located close to the approach ground line on the new northwest runway so that they are in a position to monitor the development of the aircraft noise and the effect of the noise-reduction measures there. Mobile measurements in the communities around the airport supplement the monitoring. Furthermore, the aircraft noise monitoring is complemented by mobile measurements in the municipalities surrounding the airport. Frankfurt Airport has been providing information about factors such as measurement results, route frequencies, operating direction distribution and the current operating direction of the runways for years.
These data and additional operational data can be found under Aircraft Noise Infoservice (only available in German).
Another monitoring instrument is FRA.NoM, which stands for Fraport Noise Monitoring. FRA.NoM provides up-to-date noise measurement results and verified measurement data identified as aircraft noise. Flight progress and arrival and departure data are also represented in FRA.NoM (only available in German).
The monitoring is like all information a contribution to keeping the discussion objective and thus a prerequisite for our efforts to find pragmatic solutions or improvements for the changed impact situations.
Complementary to Frankfurt Airport's aircraft noise monitoring, the Environmental and Neighborhood House in the Form Airport and Region (UNH) offers a broadly based package of information. The data measured by the airport, combined with the data from the local-authority stations, the stations operated by the UNH and flight-movement data are visualized on the Internet. Monitoring is particularly important in providing information to the local population. Interested residents are able to trace where planes are flying and at what altitudes. They are able to ascertain what noise levels will be reached in virtually real time.
We developed our own monitoring system to document the development of aircraft noise pollution in the neighborhood of the airport. It is based on the standard international noise dimension for a day and night level of 60dB (A). This value is applied to aircraft noise in the same way as noise generated by road or rail traffic. This is a 24-hour level where the noise impact at night is weighted by a factor of 10. An aircraft noise contour is defined and Frankfurt Airport calculates the numbers of residents within this profile on a yearly basis.
The contours can vary as a result of operational changes (traffic development, aircraft mix, use of runways and flight paths). They can also be affected by measures for active noise reduction and by fluctuations in the operating directions for the take-off and landing systems. When we are carrying out monitoring measurements, we use long-term average distribution for operating direction in order to eliminate the influence of weather conditions on the calculated aircraft noise contours. As a result of this, during the day (6.00 a.m. – 10.00 p.m.) 27 percent of flights routed in an easterly direction and 73 percent of westerly operations are used and during the night (10.00 p.m. – 6.00 a.m.) 26 percent of easterly and 74 percent of westerly operations are considered. This standardized operating direction distribution forms the basis for aircraft noise calculations for the years 2008 until 2011 and also for the forecast for the year 2020.