Bob Schmall wrote:
I've heard about a hearing aid that cancels out the tinnitus by producing a
sound of just the right frequency to "block" it. Senior moment--I can't
think of the technical term for this. I don't know if it's on the market,
but if it is I'll bet it sells for twice what the average aid costs, say
about $2,000.

It's called a "masking" device. Last I heard (circa '91) it used white noise
to do the deed. No idea on costs.

Pete Brooks