The reduction in underwater noise means less disturbance for marine mammals near the construction site and the favourable test results mean that Van Oord will be able to use NMS in future wind farm developments.
The NMS uses special acoustic resonators designed and produced by AdBm Technologies which reduce the noise from pile driving. As a result of this technology, specific frequencies can be targeted which produce the most noise. This makes the NMS stand out from existing systems. Furthermore, waves and currents have little or no effect on the NMS thanks to its open, but robust design. The NMS deployment system was designed and built at Van Oord. It works as it were window blinds that can be put up and down easily. The development of this innovative system and the related trials were funded through a Renewable Energy Grant from RVO and supported by TKI Wind op Zee.
Test results show that the NMS, in combination with a Big Bubble Curtain (BBC), meets the Dutch and Belgian standards for noise emissions at sea. In view of the favourable test results, Van Oord will be commissioning the NMS in the short term for use at the Borssele wind farm. This offshore wind farm lies approximately 20km off the coast of Walcheren in the Province of Zeeland. The NMS will be used during the construction of plots 3, 4 and 5. These plots will provide approximately 850,000 households with sustainable energy after commissioning.