No, as evidenced by the fact that you can almost always hear when a participant calls in from their car. When they start talking, you hear the road noise in the

No, as evidenced by the fact that you can almost always hear when a participant calls in from their car. When they start talking, you hear the road noise in the background. The only thing car-kits seemed to do was add minimum cut-offs before transmitting and make use of directional microphones.