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Aircraft noise
Stationary measurements
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The airport and the environment
Stationary aircraft noise monitoring
Munich Airport operates an aircraft noise monitoring facility as stipulated by the Air Traffic Act. It is comprised mainly of 16 permanent measurement stations.
Locations of the measurement stations
The locations of the 16 permanent measurement stations were selected within a 20-kilometer radius of the airport in consultation with the Aircraft Noise Commission, mainly along approach and departure routes and close to localities affected by aircraft noise. To ensure that they generate useful data, the stations (which bear the names of the municipalities whose noise levels they measure) are mostly positioned as close as possible to the approach and departure paths and the impacted residential areas.
The measurement stations are listed on the right with the additional links.
The measurement stations are listed on the right with the additional links.
How does the measurement work?
Each station performs one measurement per second on a continual basis. With the aid of the resulting noise level curve and the aircraft noise parameters, which can be individually programmed, and are set according to the prevailing acoustic conditions at the individual location (base-level background noise, extraneious noises), it is possible to identify noises as aircraft noise events. In addition, with the aid of the parameters, background noise such as road traffic sounds can be filtered out.
Automatic data retrieval
Each night the previous day’s measurements and aircraft noise events are transmitted to the central data station and correlated with air traffic data. That means that each aircraft noise event is matched with the specific aircraft movement that causes it. Since April 2002, the correlation has used the radar data from German Air Traffic Control. This permits very precise matching and a high automatic correlation rate.
Avoiding distortions
To avoid falsified data, meteorological data recorded simultaneously at three weather stations is monitored to check whether extreme weather conditions (e.g. winds stronger than 8.3 m/s) occurred during the measurement period. If this is the case, then the corresponding noise events are marked accordingly and excluded from statistical evaluations.
After a visual inspection of the aircraft noise events and correlations, the final step is the computation of the key acoustic parameters such as the continuous aircraft noise level in accordance with the DIN 45643 standard.
After a visual inspection of the aircraft noise events and correlations, the final step is the computation of the key acoustic parameters such as the continuous aircraft noise level in accordance with the DIN 45643 standard.
