I stumbled on this link (via Mental Floss) to a test to measure how high a frequency you can hear. We started testing this on the laptop, and I could hear up to 16kHz, and Sharon could hear 17 kHz. But we tried on the desktop speakers, and I could hear 17 kHz, and Sharon could hear 18 kHz. According to the chart accompanying the post, that’s pretty good for late-20s/early-30s.
How do you do?
bastone.org 
One reply on “Mosquito Tone Test”
I think I heard the 18kHz – it kinda hurt my ears and my face definitely contorted.