A working group of the Institute of Acoustics (IoA) has published a report setting out a new method that it hopes will be adopted by the industry as a way of
rating instances of amplitude modulation in wind turbine noise.
A 3dBA penalty could be introduced if amplitude modulation (thumping) occurs at a wind farm.
http://www.ioa.org.uk/news/ioa-publishes-am-measurement-guide
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