[dhughes]

It does, the light ring changes to indicate you're seen by the Nest Protect and when you wave to silence a smoke alarm the Nest Protect says "Smoke alarm hushed."

http://support.nest.com/article/What-is-Nest-Wave-and-how-do...

[mkesper]

So what? If you're asleep and wave at the disturbing noise in half-sleep, that voice won't wake you up. GAME OVER. NO LIVES LEFT.