14.12.20 Dear SirsPlease find attached the response from the SA EPA to submissions frommembers of the public and the Wind Turbine industry.As you will see it appears the EPA has spent a longtime doing nothingexcept reading reports/research etc, they have not undertaken anyphysical research themselves.Nor have they provided a Bibliography of what they have read, … Continue reading Email To & From Energy & Emissions Reduction Minister re: SA EPA Response
'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.