Hi Gus, problem is, tinnitus is not a sound you can cancel. It does not
exist physically. Think of it as a "bad contact" microphone connector
generating noise, it wouldn't matter so much any signal you would
introduce at the microphone to cancel the jack noise, you will only ADD
signals. Other point is that tinnitus is a mix of several, probably more
than 10 different frequencies, and they are not stable, they drift few
Hertz (and amplitude) all the time, and there is no way to "measure
them", even that I would love to actually "see" them at an
oscilloscope...

I have tinnitus in both ears, interesting is that I can definitelly hear
and locate spatially each one in a different position inside the head
(not simetric locations), the left side looks like to be generated
behind the left eye, while the right looks like to be down close to the
jaw.

Gus Calabrese wrote:
>
> Has anyone tried matching the tinnitus sounds with a 180 degree phase shifted sound from
> headphones ?
>
> Gus