Is there a way a program to make very low frequency tones on your computer that you can be sure isn't fooling you? I'm trying Gnaural (freeware), but I'm hearing all the way to 0,01 Hz without even cranking the volume up high. Probably even lower, and the supposed human world record is 12Hz. I'm guessing the program is faulty and that I'm not superhuman, though I do hear lower tones than anyone I know; like f ex electrical transformers in certain light-switches, power-lines, radios and so on and have been hearing tones lower than you're supposed to when I've been tested as a kid.