This article is from the Tinnitus FAQ, by email@example.com (Mark Bixby) with numerous contributions by others.
Various electrode placements with various voltages & frequencies may
provide some relief. External, ear canal, transtympanic, middle ear,
and cochlear electrodes have all been tried. Side effects may include
pain, and alterations to sense of taste & smell. In one study of
electrical stimulation on the round window, 3 out of 5 patients
experienced some relief when frequencies of 40 Hz or less were