I had that same idea a couple of days ago. I was thinking you could mount a small mic in the sun visor so you could pull it down to talk and it would be rite in front of your face. If there was a way to make it where the mic input was only picked up by the voice recognition program and not the rest of the computer then there wouldn't be any feedback. Then you could set the input level on the mic to be very low so it would only pick up your voice because it would be rite in front of your face. Or you could mute the radio, say the command, then unmute. If anyone has done this I would love to hear about it.