Mospuito noise
http://journal.plasticmind.com/ears/mosquito-tone-or-how-to-tell-youre-a-youngun/
I can hear 18 khz a little, 17 khz comes in clear for me. My mother says that she could only hear up to 13 khz.
Little word of warning if your hearing is good you may want to turn down your volume before you try them out.
I can hear 18 khz a little, 17 khz comes in clear for me. My mother says that she could only hear up to 13 khz.
Little word of warning if your hearing is good you may want to turn down your volume before you try them out.