the best frequencies for bone growth and fracture healing = 25 Hz or 50 Hz exactly = cat purr
february 19th, 2006
“The range of human hearing is technically, between 20 and 20,000 hertz. Infrasound is below 20 hertz. It’s been documented that one 19-year-old girl could hear at 19 hertz, but the average person - who has been exposed to car noises, loud noises, and maybe a rock concert or two - is probably hard pressed to hear below 30 or 40 hertz.”
-author unknown