HYWIND Acoustic Measurement Report: Ambient Levels and HYWIND Signature

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December 2011 — Norway

Client: Equinor ASA (formerly Statoil)

Determining the underwater acoustic signature of a HYWIND Tampen floating wind turbine compared to the ambient background noise at a control site 10 km away. JASCO performed 150 days of monitoring and subsequent analysis to discern noise sources associated with the test turbine installation and its mooring structures.