c7511713-d088-469b-a202-48a470527f13 eng series ABP Marine Environmental Research Ltd 02380711840 Medina Chambers, Town Quay Medina Chambers, Town Quay Southampton SO14 2AQ United Kingdom enquiries@abpmer.co.uk http://www.abpmer.co.uk pointOfContact 2018-04-05 MEDIN Discovery Metadata Standard Version 2.3.5 urn:ogc:def:crs:EPSG::4326 OGP 2003-2004, Subacoustech Ltd., Assessment of sub-sea noise and vibration from offshore wind turbines and its impact on marine wildlife 2007-10-01 publication 2007-01-01 creation 3225 http://data.offshorewind.co.uk/ The report in this series presents the analysis and interpretation of a significant body of underwater noise measurements taken in the period April 2003 to January 2004. The research commenced with baseline measurements of the pre-existing level of background noise at typical offshore windfarm sites in the UK, and progressed to measurements of noise from a wide variety of sources during the construction of offshore windfarms. A detailed analysis of the measurements has been made which indicates the spatial, temporal and statistical properties of the noise, and evaluates construction noise in terms of its potential for environmental effect. An estimation of the likely behavioural and physical effects on a selection of common species of fish and marine mammals has been made using both conventional analysis and the dBht (species) scale The Crown Estate +44 020 7851 5000 16 New Burlington Place London W1S 2HX United Kingdom enquiries@thecrownestate.co.uk http://www.thecrownestate.co.uk custodian Subacoustech Ltd. +44 (0)1489 891849 +44 (0)8700 513060 Chase Mill, Winchester Road, Bishops Waltham Southampton SO32 1AH subacoustech@subacoustech.com www.subacoustech.com originator notPlanned pdf Research Research and Development Activity The Crown Estate Renewable Energy Development Phases 2012-05-15T02:00:03 revision Fish behaviour SeaDataNet Parameter Discovery Vocabulary 2018-01-12 revision 106 Fish SeaDataNet Agreed Parameter Groups 2017-05-03 revision 24 Acoustic noise in the water column SeaDataNet Parameter Discovery Vocabulary 2018-01-12 revision 106 Birds, mammals and reptiles SeaDataNet Agreed Parameter Groups 2017-05-03 revision 24 Sedimentary structure SeaDataNet Parameter Discovery Vocabulary 2018-01-12 revision 106 Marine Environmental Data and Information Network Marine Environmental Data and Information Network no conditions apply eng biota environment -9.33312855790775 2.68743327033997 49.0399981037863 60.7672028638749 2003-04 2004-01 dataset The basic steps in the processing and quality checking were as follows: 1. the log file for the measurement was interrogated to find equipment settings, GPS positions and other information, such as weather conditions; 2. the signal was spectrally de-emphasised; 3. the signal was converted from volts to Pascals using the hydrophone sensitivity and amplifier gain contained in the data’s header block; 4. the signal was high pass filtered at 10 Hz to remove any low frequency hydrodynamic noise due to the passage of waves; 5. the levels of sound were calculated in dB re 1 mPa, either as peak level and impulse level for impulsive sounds, such as piling, or as sound power spectra for continuous noise, such as drilling; 6. the dBht levels were calculated for selected species of fish and marine mammals; 7. time history files, with levels scaled to dB re 1 􀀀 Pa, and power spectral density files were created. Also, sound files (*.wav files) were created. Each of these records was inspected for quality. Records were checked visually using the time history to check for transients or other spurious data. The spectra were checked for tonal noise, such as 50 Hz mains noise, depth finder or sonar transmissions. Finally, every recording was listened to for spurious noises. Data which passed the quality checks and were processed were stored for further use. https://www.marinedataexchange.co.uk/details/277/summary A link to the web service or dataset. https://www.marinedataexchange.co.uk A link to the general host site.