“A dose-response relationship between calculated A-weighted sound pressure levels, and reported perception and annoyance was found. Wind turbine noise was more annoying than transportation noise or industrial noise at comparable levels, possibly due to specific sound properties such as a “swishing” quality, temporal variability, and lack of nighttime abatement.” —Eja Pederson et al., Response to noise from modern wind farms in The Netherlands, Journal of the Acoustical Society of America, August 2009
https://www.wind-watch.org/quotes.php?t=75
