@UKBloke, I've considered this many times. If a patient brought in an instrument, like a fan or kettle, that exacerbates their tinnitus, we could record their baseline and aggravated states. Similar to a cochlear implant, the patient would serve as their own control.I wonder if this opens up further avenues to measure "reactive tinnitus"?
However, then I wondered—how can we be sure that changes in brain responses aren't just due to sound processing, rather than truly representing tinnitus activity?