IEC 61400-11-2012 amd1-2018 cor1-2019 PDF

Full title and description

IEC 61400-11:2012/AMD1:2018/COR1:2019 — Wind turbines — Part 11: Acoustic noise measurement techniques (consolidated version: third edition 2012 with Amendment 1:2018 and Corrigendum 1:2019). This consolidated publication incorporates the procedures, data‑reduction methods and editorial corrections used to characterise wind turbine noise and to enable consistent comparisons between machines under defined wind and meteorological conditions.

Abstract

This standard specifies field measurement techniques and data‑reduction procedures for characterising wind turbine acoustic emissions. It emphasises measurement geometry and meteorological inputs appropriate to turbine‑close measurements (to minimise propagation errors while accounting for finite source size), defines reference wind speeds and bins, addresses tonal and broadband assessment, and sets out reporting and uncertainty considerations to support repeatable noise characterisation. The consolidated copy includes Amendment 1 (2018) and Corrigendum 1 (2019).

General information

• Status: Published (international standard, consolidated edition).
• Publication date: Amendment 1 published 15 June 2018; Corrigendum 1 published 10 October 2019; consolidated CSV edition reflecting these changes is listed by IEC as the consolidated 2018/2019 release.
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 27.180 (Wind turbine energy systems).
• Edition / version: Consolidated edition 3.1 (third edition 2012 with Amendment 1:2018 and Corrigendum 1:2019 — often referenced as IEC 61400-11:2012+AMD1:2018 CSV).
• Number of pages: Consolidated CSV ~123 pages (amendment alone ~16 pages; corrigendum 1 page).

Scope

The standard defines measurement procedures for determining the acoustic noise emissions of wind turbines across a range of wind speeds and directions. It is intended for measurements taken at distances sufficiently close to the turbine to avoid long‑range propagation effects yet far enough to represent the finite source size. The procedures and data‑reduction principles are tailored to characterise turbine noise (including tonal components and uncertainty assessment) rather than to perform community noise impact assessments. The consolidated version includes technical changes introduced in the 2018 amendment and the editorial corrections in the 2019 corrigendum.

Key topics and requirements

• Measurement geometry and microphone placement to capture turbine‑close emissions with minimal propagation bias.
• Reference wind speed definitions, binning procedures and meteorological measurement requirements (anemometry and turbulence descriptors).
• Data acquisition, processing and reduction methods, including procedures introduced or clarified by Amendment 1 (2018).
• Tonal noise assessment and methods for determining tone levels and penalties.
• Uncertainty evaluation, measurement validation, data selection criteria and reporting format to support reproducibility.
• Mandatory reporting fields and recommended presentation of results to facilitate comparisons across turbines.

Typical use and users

Used by wind turbine manufacturers, independent test laboratories, certification and conformity bodies, acoustic consultants, regulatory authorities and project developers to quantify turbine noise emissions for type testing, acceptance testing, certification, product development and planning. The standard supports consistent manufacturer declarations, certification evidence and comparisons between turbine models.

Related standards

IEC 61400-11 sits within the IEC 61400 series of wind‑energy standards and is commonly cross‑referenced with other parts covering performance, site assessment and instrumentation (for example power performance parts in the IEC 61400‑12 family and measurement‑related guidance across the 61400 series). National and regional adoptions/derivatives include harmonised EN/BS adoptions such as EN/BS EN 61400-11 with the A1 amendment. Guidance on measurement uncertainty often refers to ISO/IEC Guide 98-3 (GUM).

Keywords

wind turbine; acoustic noise; noise measurement; sound power; A‑weighted level; tonal assessment; measurement uncertainty; anemometry; data reduction; IEC 61400; amendment; corrigendum.

FAQ

Q: What is this standard?

A: IEC 61400-11:2012/AMD1:2018/COR1:2019 is the consolidated international standard that specifies field measurement and data‑reduction techniques for characterising wind turbine acoustic emissions; it combines the third edition (2012), Amendment 1 (2018) and Corrigendum 1 (2019).

Q: What does it cover?

A: It covers microphone and measurement geometry, meteorological measurements and reference wind speeds, data acquisition and reduction procedures, tonal assessment methods, uncertainty considerations, validation checks and required reporting formats for turbine noise characterisation. The 2018 amendment introduced technical changes to data‑reduction principles and the 2019 corrigendum made editorial corrections.

Q: Who typically uses it?

A: Wind turbine manufacturers, independent test houses and certification bodies, acoustic consultants, regulators and wind‑farm developers use this standard for type testing, certification, acceptance testing and design validation where quantitative turbine noise data are required.

Q: Is it current or superseded?

A: The consolidated publication incorporating Amendment 1 (2018) and Corrigendum 1 (2019) is the current consolidated edition published by IEC; the amendment was published 15 June 2018 and the corrigendum on 10 October 2019. Users should check the IEC catalogue or their national standards body for any subsequent revisions or newer amendments after 2019.

Q: Is it part of a series?

A: Yes — it is Part 11 of the IEC 61400 series, which addresses many aspects of wind turbines (design, testing, performance, measurement techniques and safety). Several other 61400 parts (for example power performance parts in the 61400‑12 family) are commonly referenced together with 61400-11 in certification and test programs.

Q: What are the key keywords?

A: Acoustic noise, wind turbine, sound power, A‑weighted level, tonal noise, measurement procedure, anemometry, data reduction, uncertainty, IEC 61400.