'I suggest that with respect to the description of wind turbine noise it is a matter of terminology that needs a shift as follows: The language should be pulsations at an infrasound rate. Modulation of the entire signal at an infrasound rate. (Zwicker and Fastl call this fluctuation as a sensation detected by the ear). AM is present as some discrete low frequencies modulated at the bpf. UK method of AM is determining the modulation index of the fluctuating signal (not technically AM). You can determine the Modulation Index of the low frequency noise that is AM.' -Steven Cooper.
November 6, 2019 By Sherri Lange-Master Resource Source: https://www.masterresource.org/wind-turbine-noise-issues/sensing-not-hearing-cooper-qa-1/ Congratulations to Steven Cooper on his appointment to the European Acoustics Association Technical Committee on Noise, as the group leader on wind turbine noise, and on presenting three papers at the International Congress on Acoustics in Germany. ~DeFrock. “But wind turbine noise issues are not just … Continue reading ‘Sensing but not Hearing’: Steven Cooper On Wind Turbine Nuisance-Part 1.
The Australian Industrial Wind Turbine Awareness Network (AIWTAN), has written and expressed the Networks concerns many times to the National Wind Farm Commissioner. Copied below is an open letter with 7 questions, which have not been adequately responded to by Mr Dyer. The WHO guidelines have since been updated and these unanswered questions remain relevant ~DeFrock.