Quote:
Originally Posted by Dellaster
I don't hear anything, but it's possible that it's out of my audible range. I can hear the 19khz tone, but not the 20khz tone, at the Mosquito Ringtone Hearing Test. If you can hear 20khz or higher you may be noticing something most people can't. |
Better test it on your dog! If it jumps every time you turn a page you know the sound exists.