![]() ![]() The larger water depths decrease the effectiveness of the air bubble curtains due to the air bubbles drifting away with current and waves.ĭue to the inherently different method of driving the pile (reducing soils resistance and the pile penetrating by gravity rather than by hard blows) the noise emitted is far less than that of an impact hammer. Besides the huge costs involved these noise mitigation measures, they also add risk of stopping the works due to malfunctioning (parts) of the mitigation system, plus most systems require a lot of power to operate, increasing the environmental impact. Examples of mitigation measures are: bubble curtains, Hydro Dampers, Coverdams and other noise mitigation systems, used quite often in combination of them. Millions of Euro’s are being spent on Offshore Wind Farm projects in order to try and reduce the noise levels. As these emissions are strictly regulated in many countries it is becoming increasingly more difficult to stay within the set limits. The noise emissions for impact driving increase as the piles become bigger. The use of large impact hammers has a major downside, namely that they are very noisy and therefore damaging for the underwater wildlife. ![]()
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