The OP was asking about a product called Quietus. Quietus for Tinnitus Relief | Welcome! Find Tinnitus relief products, as well as other ear health products and information.
Check out the site, if you scroll down you will find sound bites you can play, the one that says "ear ringing sound" fits what I have to a T.
I heard the add on the radio "call now, FREE 30 day supply!" I was all over that only to find you couldn't get the free sample until you payed $150.00 for the first 90 day bottle. Then the 2nd bottle was free. That made me think the didn't have a lot of confidence in their product so I did not buy.
I got home and researched them to see if it works and most comments are that it doesn't. That's too bad, if someone would invent a fix for this I would be all over it.
I have heard the radio ads myself and wondered if it would work. The information you provided here make me guess it is pretty much a scam as so many things are. The old adage "if it sounds too good to be true...."!
I also use the radio to cover over the sound of the "ocean" to go to sleep. I have been very consistent in using hearing protection the last 15 years or so. Damage was done when I was young. When I started in the oil refinery 37 years ago you could barely find hearing protection, now its use is mandatory in all operational areas.