The IOA has formed an amplitude modulation (AM) working group as a sub-group of the wind turbine noise working party.
Gavin Irvine, of Ion Acoustics, is the chairman. Other members will include acousticians working for developers, local authorities and objector groups.
It aims to review methods to quantify and assess AM in wind turbine noise. This review will include: the AM work funded by R–UK; the “Den Brook” condition and other historic and emerging research. A further aim is to progress a preferred metric from those considered and a preferred methodology for assessing AM.
As a first step, the group will produce an options paper for consultation, which is due to published in September. A workshop is also planned for November to allow members and interested parties to participate in the process, shortly after which a recommendation will be made on a preferred metric and methodology.