IEC 61400-11:2018
Wind turbines - Part 11: Acoustic noise measurement techniques

Standard No.
IEC 61400-11:2018
Release Date
2018
Published By
International Electrotechnical Commission (IEC)
Status
 2018-06
Replace By
IEC 61400-11:2012/AMD1:2018
Latest
IEC 61400-11:2012/AMD1:2018/COR1:2019
Scope
This part of IEC 61400 presents measurement procedures that enable noise emissions of a wind turbine to be characterised. This involves using measurement methods appropriate to noise emission assessment at locations close to the machine, in order to avoid errors due to sound propagation, but far away enough to allow for the finite source size. The procedures described are different in some respects from those that would be adopted for noise assessment in community noise studies. They are intended to facilitate characterisation of wind turbine noise with respect to a range of wind speeds and directions. Standardisation of measurement procedures will also facilitate comparisons between different wind turbines. The procedures present methodologies that will enable the noise emissions of a single wind turbine to be characterised in a consistent and accurate manner. These procedures include the following: location of acoustic measurement positions; requirements for the acquisition of acoustic, meteorological, and associated wind turbine operational data; analysis of the data obtained and the content for the data report; and; definition of specific acoustic emission parameters, and associated descriptors which are used for making environmental assessments. This International Standard is not restricted to wind turbines of a particular size or type. The procedures described in this standard allow for the thorough description of the noise emission from a wind turbine. A method for small wind turbines is described in Annex F.

IEC 61400-11:2018 Referenced Document

  • IEC 60688:2012 Electrical measuring transducers for converting a.c. and d.c. electrical quantities to analogue or digital signals
  • IEC 60942:2003 Electroacoustics - Sound calibrators
  • IEC 61260:1995 Electroacoustics - Octave-band and fractional-octave-band filters
  • IEC 61400-12-1:2005 Wind turbines - Part 12-1: Power performance measurements of electricity producing wind turbines
  • IEC 61400-12-2:2013 Wind turbines - Part 12-2: Power performance of electricity producing wind turbines based on nacelle anemometry
  • IEC 61672-1:2013 Electroacoustics - Sound level meters - Part 1: Specifications
  • IEC 61672-2:2013 Electroacoustics - Sound level meters - Part 2: Pattern evaluation tests
  • IEC 61672-3:2013 Electroacoustics - Sound level meters - Part 3: Periodic tests
  • ISO/IEC GUIDE 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)

IEC 61400-11:2018 history

Wind turbines - Part 11: Acoustic noise measurement techniques


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