A website offering various tests like
A couple of hearing tests
How to Listen is a desktop software application developed by the Harman International R&D group for the purpose of training and selecting listeners used in audio product research, development, and testing. The software consists of a number of training exercises where different kinds of timbral, spatial and dynamic distortions commonly found within the recording and audio chains are simulated and added to music.
A pretty good test to check for overall pitch perception ability.
The test is purposefully made very hard, so excellent musicians rarely score above 80% correct. Give it a try!
