55ab8ae8-2e7f-4da2-a160-92a88dd86d75 English series series 2026-03-27T10:28:43 MEDIN 3.1.2 oceans Acoustic noise in the water column SeaDataNet Parameter Discovery Vocabulary 2023-12-12 revision Sound velocity and travel time in the water column SeaDataNet Parameter Discovery Vocabulary 2023-12-12 revision Post-Construction monitoring The Crown Estate Renewable Energy Development Phases 2012-05-15 revision Renewable Energy Lease area The Crown Estate Renewable Energy Development Areas 2012-05-15 revision Energy resources GEMET - INSPIRE themes, version 1.0 2009-07-31 revision SeaDataNet sea areas 2012-11-07 revision North Sea SeaVoX Vertical Co-ordinate Coverages 2020-05-21 revision water column 2013-04-17T00:00:00 2013-05-05T00:00:00 0.828491 1.231625 52.948708 53.182847 TCE-1985 Marine Data Exchange 2013, National Physical Laboratory, Sheringham Shoal, Measurement of Underwater Noise Measurement of Underwater Noise 2021-05-17T14:06:05 publication English In response to FEPA Licence (33369/10/3, Supplementary Condition 9.36) for the Sheringham Shoal Offshore Wind Farm (OWF), underwater noise measurements were undertaken to assess underwater noise from the operational wind farm at ‘various frequencies across the sound spectrum, at a selection of locations immediately adjacent to and between turbines and within and outside the array at varying distances’. The underwater acoustic measurements performed at the operational Sheringham Shoal OWF, show that the radiated underwater sound from the particular wind turbines employed (Siemens SWT-3.6-107) is predominantly made up of tonal frequency components below around 500 Hz, resulting from the rotating nature of the turbine and its sub-components. Measurements were obtained in close proximity to individual wind turbines (~40 to 50m) for their full range of operating conditions, with snap-shot measurements at various positions between wind turbines and at a number of ranges away from the wind farm (ranging from about 50 m to 31 km), at all four compass points. The noise radiated from the operational wind turbines was typically comparable to or below the background noise level, and it was only certain frequency components that could be attributed to the operational wind turbines. The measured levels at the Sheringham Shoal OWF are comparable to those reported previously in the literature, where the same literature suggests that the underwater noise resulting from operational wind turbines would not be expected to result in injury to marine mammals and fish. The resultant noise levels in proximity to the turbines are also substantially lower than those expected to result in the onset of a permanent threshold shift in hearing response (PTS), or even a temporary threshold shift in hearing response (TTS), in marine mammals (Southall et al., 2007). It is also unlikely that these noise levels would result in a behavioural response, except perhaps in very close proximity to the turbines and only for species which might be sensitive to the tonal frequencies radiated. There will be no limitations when published on the Marine Data Exchange otherRestrictions Data Must be used in accordance to the Marine Data Exchange's Terms of Use: https://www.marinedataexchange.co.uk/content/info/terms-of-use otherRestrictions The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk custodian National Physical Laboratory (NPL) pete.theobald@npl.co.uk originator The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk distributor wuinor Scira Offshore Energy Ltd gm_SciraInfo@equinor.com owner notPlanned Documents https://www.marinedataexchange.co.uk/details/TCE-1985/summary A link to the web service or dataset. https://www.marinedataexchange.co.uk A link to the general host site. Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08T00:00:00 publication Conformity with the Commission Regulation (EU) No 1089/2010 was either not relevant to this dataset or not a requirement of the Marine Data Exchange for the creation and submission of this dataset; therefore, conformity has not been assessed and cannot be declared False series To meet the requirements of the licence condition, underwater acoustic measurements were performed at a number of locations within and outside the wind farm site including measurements adjacent to and between wind turbines, measurements within the wind farm site and measurements along transects away from the wind farm. This was achieved using a combination of mobile survey vessel (the Vidar) measurements and autonomous recorders: a) Mobile survey vessel measurements were used to characterise underwater sound at various ranges and positions along transects radiating away from individual wind turbines (A1, A5 and K3), and from the wind farm site. The specific wind turbines measured were chosen based on the geology, penetration depth and water depth at the turbines, and the transects were chosen to capture variation in bathymetry in the area surrounding the wind farm. In addition to these survey vessel based transect measurements, underwater sound was also measured at a number of pseudo-random locations, between adjacent turbines within the wind farm site and also on the array boundary, to capture variability across the wind farm site. b) Autonomous recorders were used to characterise the sound radiated by two individual wind turbines under a range of environmental conditions (wind, sea state, tidal variations) over a period of 21 days (sufficient to capture the full operating range of the wind turbines). The autonomous recorders were moored around 4 m above the sea floor, about 50 m from turbines A1 and A5. These two deployment locations were chosen based on the variations in bathymetry and geology at the wind farm site. Consideration was also given to local shipping patterns (DECC, 2013) and wind farm operational requirements. The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk pointOfContact EPSG Geodetic Parameter Registry 2022-11-29 revision WGS 84