HAMBURG (dpa-AFX) – If you want to know how much noise is generated when building wind turbines in the sea, you can now find the exact data on the Internet. The Federal Maritime and Hydrographic Agency has compiled the information in its database Marinears (Marine Explorer and Registry of Sound – marine exploration and recording of sound), as a spokeswoman said on Wednesday.
The measurement data for more than 25 million hammer blows, which were carried out during the construction of 1500 foundations and 2500 piles near the German coast, were recorded. The information is about both ramming noise and noise reduction systems such as a bubble curtain or a soundproof jacket.
Construction noise can cause serious injuries to marine animals such as harbor porpoises. In order to protect the animals, the ramming noise when building offshore systems must not be more than 160 decibels at a distance of 750 meters from the sound source. The wind farm installers must measure the noise during the construction work and transmit the data to the Federal Office. This information is now available through Marinears./bsp/DP/fba