The IOA has published for consultation the final two supplementary guidance notes (SGNs) to support its A Good Practice Guide to the Application of ETSU-R-97 for the Assessment and Rating of Wind Turbine Noise (the GPG).
The notes cover sound power level data (SGN 3) and noise propagation over water for onshore wind turbines (SGN 6). They can be viewed below. The closing date for the receipt of comments is Friday 31 January 2014.
The SGNs contain additional clarifications, references, and worked examples on issues covered within the GPG. They were not published at the time of the GPG launch in May this year as the IOA working group responsible for drafting the notes wanted time to receive feedback from users of the GPG on those issues that could usefully be covered by the notes. Further feedback is now sought on any issues that may have been missed, or require additional clarity.
Following the closing date, the IOA working group will consider all the responses, and aims to finalise the SGNs for publication by Easter 2014.
The first four SGNs can be viewed elsewhere in the Latest News section at the bottom of the item headed "Wind turbine notes consultation".
The Good Practice Guide can be found in the Publications Section under Good Practice Guide.