Here is a selection of links to tinnitus simulators that I gleaned
from a page back in 2003. I haven't checked all the links to see if
they still work.

have a look at neuro.bio.tu-dermstadt.de

Here's an advanced tinnitus simulator:
http://www.hitech.se/development/products/tinphon.htm

http://neuro.bio.tu-darmstadt.de/langner/tinnitus-html/english/Tinnitus_Beispiele.htm

NCH Sound Tone Generator lets you create audio test tones, sweeps or
noise waveforms using a Windows computer with a sound card or a
PocketPC handheld.
www.nch.com.au/tonegen/index.html

www.tinnitus-audiology.com/

tinnitus, custom compensated bridges,
5 string tabs, midis: www.haruteq.com
banjo MP3's: www.mp3.com/bartveerman

Elly's Tinnitus Resources
http://eebee.net/