There is no clinical evidence yet that suggests TransEar as a tinnitus reduction device. At least one neuro-otologist disagrees, but until we see the evidence, our official position is that it is not indicated for mitigating tinnitus.
To answer question #2, TransEar works exactly like BAHA but without surgery, through bone conduction. Instead of driving a receiver/speaker, our hearing aid processor drives an oscillator which sits in a hard shell in the dead ear. That shell has a long canal, thus carrying the oscillations to the bony portion of the ear canal, which is covered by only a very thin layer of skin. The shell is made by laser from a scanned image of the impression of the ear, as fit and comfort are important issues. Each TransEar is a custom product, and the transfer unit has the owners initials embedded in it.
Since TransEar was new in 2005, I am not aware of any studies comparing it to BAHA. I'm sure there will be at least one by the end of 2006, however. The key difference is of course, surgery. Both BAHA and TransEar are good products, but they are not indicated for the same conditions, except for SSD.
I hope this answers the two questions recently posted.