This post first appeared on windturbinesyndrome.com The actual level of infrasound in this figure at 1 Hz is above 90 dB. Measuring infrasound with dBG at 1 Hz gives a level of only 50 dB.  Thus 40 dB is “hidden.”  Forty dB is a huge amount of sound energy, which will not be heard at … Continue reading Why dBG, dBC, and dBA “hide” the true “dose” of infrasound below 10 Hz