If the areas relatively close to these three airports have already been monitored permanently for several years by Aéroports de Paris, it was not yet the case of further areas that nevertheless have overflights below 2000 metres and where many residents declare they are annoyed by air noise nuisances.
After a wide noise measurement campaign organised over a year for the documentation of more than a hundred situations of noise exposure within these areas and taking account the planned or predictable evolutions of the flight paths in Ile-de-France, Bruitparif has selected 15 sites that will be monitored permanently from now on with expert noise measurement stations.
These are NA37 stations from RION, which not only measure the noise level in the environment, second after second, with an excellent precision and reliability (class 1 metrology) but also identify the noise source in real time through a method of acoustic localisation. This type of monitoring stations can distinguish aircraft noises (they come from above!) from the other environmental noises related to land transportation (roads, railways) and daily activities. The possibility of aircraft localisation through acoustic detection has been known for a long time as it was used in military conflicts before the arrival of the first radars. However, this is the first time they are being used in France and in Europe for an operational noise monitoring network around airports.
In order to make their installation easier in urban areas, Bruitparif has conceived a specific equipment to house the measurement station and to supply it with a fuel cell.
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