How's Your Hearing?

I know you've all heard of the ring tones that grown ups can't hear. A friend pointed me to a website where you can listen to the different tones. They rank them by what age range can usually hear them. How old is your hearing? I couldn't hear it until the 39 and under category, which is normal for my age of 31. Keryn (who is three month older than me, I should note) couldn't hear it until the 49 and under category.

http://www.freemosquitoringtones.org/