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Title: Measurement and characterisation of radiated underwater sound from a 3.6 MW monopile wind turbine
Authors: Pangerc, Tanja
Theobald, Pete D.
Wang, Lian-Sheng
Robinson, Stephen P.
Lepper, Paul A.
Keywords: Sound pressure
Wind turbines
Underwater sound
Acoustic noise measurement
Wind farms
Issue Date: 2016
Publisher: © Acoustical Society of America
Citation: PANGERC, T. ... et al, 2016. Measurement and characterisation of radiated underwater sound from a 3.6 MW monopile wind turbine. The Journal of the Acoustical Society of America, 140 (4), pp. 2913-2922.
Abstract: This paper describes underwater sound pressure measurements obtained in close proximity (50 m) to two individual wind turbines, over a 21-day period, capturing the full range of turbine operating conditions. The sound radiated into the water was characterised by a number of tonal components, which are thought to primarily originate from the gearbox for the bandwidth measured. The main signal associated with the turbine operation had a mean-square sound pressure spectral density level which peaked at 126 dB re 1 lPa2 Hz 1 at 162 Hz. Other tonal components were also present, notably at frequencies between about 20 and 330 Hz, albeit at lower amplitudes. The measured sound characteristics, both in terms of frequency and amplitude, were shown to vary with wind speed. The sound pressure level increased with wind speed up to an average value of 128 dB re 1 lPa at a wind speed of about 10 ms 1, and then showed a general decrease. Overall, differences in the mean-square sound pressure spectral density level of over 20 dB were observed across the operational envelope of the turbine.
Description: This paper is closed access until 26th April 2017.
Sponsor: Department for Business, Energy and Industrial Strategy (BEIS) through the National Measurement System Programme for Acoustics and Ionising Radiation Metrology.
Version: Published
DOI: 10.1121/1.4964824
URI: https://dspace.lboro.ac.uk/2134/23368
Publisher Link: http://dx.doi.org/10.1121/1.4964824
ISSN: 0001-4966
Appears in Collections:Closed Access (Mechanical, Electrical and Manufacturing Engineering)

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