During the tests, noise measurements are carried out by Bruitparif, a technical noise study center whose model is comparable to Airparif, which exists to measure air quality. Bruitparif has thus become a world reference in terms of innovation in technical tools that make it possible to identify a source of noise pollution with fine precision. The “jellyfish” is a measurement tool with four microphones, coupled with a camera to identify in real time in very noisy environments the exact source of noises exceeding the tolerance thresholds (a noisy air conditioning system on a building that has one ten, a scooter in a stream of vehicles on a road, etc.).
Technical director of Bruitparif, Christophe Mietlicki and his teams are at the origin of this system: “The noise hits the membranes of these four microphones with small time lags. These small shifts in time, we exploit them to determine where the noise is coming from. Then we have a small optical sensor that takes 360-degree photos of the environment and that will give us the possibility of projecting in the image the place from which the nuisances come from at this precise moment..”
The system is exported because the communities all have the same concern: to fight against noise pollution, you have to know very precisely where it comes from.