Pretty fun listening tests on this page. I got 2/3 right on the one immediately below. Time to hang it up, I've lost it!
"Sound Challenge: Can you hear which is louder?"
http://www.noiseaddicts.com/2010/03/sou ... is-louder/
"Hearing Test – Can You Hear This?"
http://www.noiseaddicts.com/2009/03/can ... ring-test/
"Do 320kbps mp3 files really sound better?"
http://www.noiseaddicts.com/2009/03/mp3 ... t-128-320/