This was argued to death on Slashdot over a week ago.
But the main thing is that there are various rules of physics which mean this simply isn't possible. Even if the noise energy from the mouth could be tapped with 100% efficiency (LMAO) then the encoding and transmission energy required would be too much.
"Phone batteries to be supplimented by power from speech" might be a better headline.
Paris, because she gives out a lot of energy through her mouth.