This is a lie. In fact the Church never speaks the "Voice of Jesus" and does not claim to do so. You fail to provide the requested proof because you realize that you are full of sh-t.
Boy, you are really getting desperate to stopper up those ears, aren't you?
"Voice of Jesus" is just a commonly used shorthand for the doctrine of Papal Infallibility. Here are the first three theological discussions I found that employ the phrase, you can find hundreds such, including especially in catholic sources, in five seconds on Google.
http://www.catholicherald.com/gospel/97gc/gc970626.htm
http://www.blessedquietness.com/journal/housechu/popeexam.htm
http://www.circleofprayer.com/catholicism8.html