Maasvlakte sound measurement network

The problem

Noise generated by industrial sources is often a cause of annoyance for people living in the surroundings of industrial areas, even when all individual plants adhere to regulations and possess all mandatory environmental permits. The variety of industrial noise sources is wide and the noise generated can be complex, making noise monitoring of large industrial areas not trivial. Low-frequency noise sources in particular are hard to localize using conventional sound measurement equipment, and may give rise to noise annoyance complaints at great distance from the source. This is also the case for the Maasvlakte, a part of the port of Rotterdam. Noise, mostly of low-frequency nature, generated by sources within this area, is often a cause of annoyance for residents of the nearby city of Oostvoorne, located 3km to the south of the area. In order not to impede potential future expansion of the Rotterdam harbour, it is important that the sources and mechanisms of this problem are known.

Our solution

The Maasvlakte sound measurement network (“Geluidmeetnet Maasvlakte”) was commissioned by DCMR with the goal to map the noise sources over the Maasvlakte area. ASAsense developed a solution for this challenge that consists of a combination of several 50m-wide robust microphone arrays, each containing 40 curvilinearly and non-equidistantly spaced microphones. These arrays are placed at strategically selected locations along the border of the area, and through triangulation, they allow to continuously locate the dominant sources of noise over this area, and to give an estimate of the power of these sources. An online webinterface was developed that allows the client to visualize noise emission maps for arbitrary selected timeframes.

  • Microphone arrays

  • Fixed sensor nodes

  • Online interface