Hmmm, I wonder how others will do. I was amazed at how absolute the cutoff was, I could hear one and the next, I couldn't hear at all!!

Leave me a comment with your highest heard frequency, just out of curiosity.

You are in your twenties

You can still hear reasonably well and you can play this without my old fart colleagues hearing it which makes you feel kinda good. The highest pitched ultrasonic mosquito ringtone that I can hear is 15.8kHz

Find out which ringtones you can hear!