How good is your hearing

For all of my "audio" fanatics friends out there who spend 4000-5000 dollars on a set of loudspeakers who's frequency responds is something like 150-35,000hz.i found this funny website http://www.freemosquitoringtones.org/my hearing range maxes out around 15,000hz. My Son can go up to 19khz.Sad... aging does the ear bad. Maybe some doctors will be able to improve my hearing range in the future, but it's definitely not as good as it once was.I still Love my NHT 1.5 limited edition in the sycamore finish. :)I ...