2. The method of claim 1, wherein said step of using said bio-signal to produce said modified signal comprises modifying a microphone's response to said utterance in response to said bio-signal.
2. The method of claim 1, wherein said step of using said bio-signal to produce said modified signal comprises modifying a microphone's response to said utterance in response to said bio-signal. 4. The method of claim 2, wherein a gain of said microphone is modified in response to said bio-signal.