Remember the ""? The thing that looks like an antiquated ear trumpet? You'll never need it if this concept ever becomes a reality.
The "Batphones" appear to use the same kind of "passive amplification" theory--meaning that no electronics are involved, just a single piece of plastic, according to Audio Junkies. They're described as alternative hearing aids, though they could probably be used as natural amplifiers as well. But be aware: You won't be able to use these while wearing an " " because you won't be able to fit both of them on your head at the same time.