International Standards and Conformity Assessment for all electrical, electronic and related technologies

TC 88

Wind energy generation systems

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MT 11 Convenor & Members


Mr Bo Søndergaard
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Mr Payam AshtianiCA
Mr Jeremy H BassGB
Ms Sylvia BroneskeGB
Mr Renjie ChengCN
Mr Tomas Rosenberg HansenDK
Mr William E. HolleyUS
Ms Arlinda HuskeyUS
Mr Sung Soo JungKR
Mr Tae Ki KimKR
Mr Sookrae KimKR
Mr Markus KoschinskyDE
Mr Kaj Dam MadsenDK
Mr Takatoshi MatsushitaJP
Mr Niels Christian Møller NielsenDK
Mr Jesús Pinedo ZárateES
Mr Erik SlothDK
Mr Lars Sommer SøndergaardDK
Mr Ryoichi TakemotoJP
Mr Jeroen Van DamUS
Mr Mike WöbbekingDE
Mr Philip WockenDE
Mr Rainer WortelkerDE

Title & Task

MT 11

Acoustic noise measurement technique


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.

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;
• definition of specific acoustic emission parameters, and associated descriptors which are used for making environmental assessments.