There's a few websites (one was a scam site selling pills to cure the ringing) that have audio samples of the various ringing sounds. I found it remarkable that of the four samples on a website, the ringing was exactly like mine. I was excited to tell the specialist about the site and play the file for him, from my phone. Alas, none of my doctors cared to hear it. Guess they were not interested because they have all "heard it before." (I have to tell at least one lousy joke or pun a day, doctors' orders.)

Here is the sound machine I use (supposed to be great for people subject to hearing one's snoring):

http://soundofsleep.com/

Bonus Comment: There are many FREE programs in Android Market that produce white noise and other sounds, that are great for dealing with this. Search in Market "white noise" and the various programs will show up.