TY - RPRT
TI - ESRa - Evaluation of Systems for Ramming Noise Mitigation at an Offshore Test Pile
AU - Wilke, F
AU - Kloske, K
AU - Bellmann, M
AB - As part of the ESRa research project, the handling and effectiveness of five different noise mitigation systems for the construction of pile-driven offshore wind farms were evaluated in a round robin test conducted at the Brodten pile in Lübeck Bay (Baltic Sea). The systems were:1. Tube with inner bubble curtain by the company IHC (IHC NMS)2. Fire Hose System by the company Menck (Menck FHS)3. Little Bubble Curtain (LBC) by the company Weyres4. Noise-mitigation shells with two bubble curtains (modular design) by the company Weyres (Weyres BeKa Jacket)5. System 5: Hydro Sound Damper by the TU Braunschweig (TUBS) and Dr.Elmer (TUBS/Elmer HSD)All systems were used under identical environmental boundary conditions with the aim of comparing potential noise mitigation levels by way of a uniform measuring concept. ITAP GmbH has developed a specific measurement and evaluation concept for underwater noise measurements in compliance with StUK3 requirements; it also conducted and evaluated the measurements.All noise mitigation systems tested yielded significant reduction effects. Within the 750-metre radius around the noise source that is relevant for the limit value and in the 100 – 300 Hertz frequency range where the greatest amount of energy is introduced into the water, the damping is between 0 and 10 decibel (dB) SEL. In the frequency range of up to 5,000 Hertz, which is the most sensitive audible range for marine mammals, the mitigation effect is a maximum of 25 dB.With the test systems, the broad-band reduction of the sound exposure level(SEL) is 4.2 to 6.1 dB. Corrected by the ground effect at the test location, the test systems achieved reductions in the broad-band SEL of approx 7 – 9 dB.
DA - 2012/05//
PY - 2012
SP - 168
PB - Bard College
UR - https://silo.tips/download/esra-evaluation-of-systems-for-ramming-noise-mitigation-at-an-offshore-test-pile
LA - English
KW - Wind Energy
KW - Fixed Offshore Wind
KW - Floating Offshore Wind
KW - Noise
KW - Marine Mammals
ER -