Paul Swift has started a change.org Petition asking for signatures; ‘to help persuade governments all over the world to stop all wind turbine projects until the health issues caused by infrasound are thoroughly investigated by an independent body’.
Image; windaction.org
DeFrock acknowledges and thanks Steven Cooper for investigating wind turbine noise and travelling throughout the world presenting that knowledge for greater understanding of sound issues experienced at wind energy projects.
Steven Cooper, an acoustic engineer for forty years, has for the past 9 years been asking relevant questions and thoroughly investigating noise issues at wind farms. He has a hugely respected understanding of noise, what it is and how it may impact on people.
In February, 2018, he was interviewed by Sherri Lange and an article in Master Resource explains the ‘wind turbine signature’ and the pulsation occuring at an infrasound rate.
Steven Cooper presented a number of papers to the Acoustical Society of America in New Orleans. Here is one:
Subjective perception of wind turbine noise – The stereo approach-Steven Edwin Cooper, and Chris Chan
DeFrock 
there is a problem in that there may not be infrasound present. There is a pulsation that occurrs at an infrasound rate.
The Infrasound signature is the analysis of the pulse and can be obtained even if filters are placed in the system so no audible infrasound is generated.
I have presented this information to the Acoustical Society of America’s Wind Turbine Working Group.
The problem with the petition is that under the current wording they could investigate the wrong thing and hence find no problem.
If you have a means to send these comments to Paul Swift I am Ok with that
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Thank-you Steven Cooper. We have added some links, (above), to your work, to help DeFrock readers understand there is a difference between investigating infrasound and pulsation, they are two different things. Sorry we are unable to reach Paul Swift, hoping he might be forwarded this information.
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