Oops! Wait! I found it!
Narrowband Noise
Thanks, Steve.
Found some interesting threads on the subject of Tinnitus during my search as well:
How can I get a ‘narrow slice’ of white noise?
Notch Filter Preference and Tinnitus
https://forum.audacityteam.org/t/notch-filter-preference-and-tinnitus/13024/1
Man! It’s interesting to find a lot of t suffers on a website about a free, award-winning open source program for recording and editing sound.
The verdict is still out for me personally, but it would a appear a lot of people are subscribing to sound therapy to cope with their Tinnitus.
Cheers.