1. A microphone module for an audio system of a vehicle, the vehicle having a cabin, a windshield, an interior rearview mirror mounted to an interior surface of the windshield and a headliner extending along an upper edge of the windshield, said microphone module comprising: at least one microphone for receiving audio signals from within the cabin; and a housing for mounting said at least one microphone, said housing being mountable between the headliner and the mirror, said at least one microphone having a microphone harness which is electronically connectable to a vehicle wiring within the headliner.