6. The voice acquisition system of claim 1 , wherein said interior rearview mirror assembly comprises an interior electrochromic rearview mirror assembly having electrically variable reflectivity, and wherein said interior electrochromic rearview mirror assembly includes electronic circuitry for at least adjusting the reflectivity of said interior electrochromic rearview mirror assembly, and wherein said at least one microphone at least one of (a) accesses a component of said electronic circuitry of said interior electrochromic rearview mirror assembly, and (b) shares a component of said electronic circuitry of said interior electrochromic rearview mirror assembly.
6. The voice acquisition system of claim 1 , wherein said interior rearview mirror assembly comprises an interior electrochromic rearview mirror assembly having electrically variable reflectivity, and wherein said interior electrochromic rearview mirror assembly includes electronic circuitry for at least adjusting the reflectivity of said interior electrochromic rearview mirror assembly, and wherein said at least one microphone at least one of (a) accesses a component of said electronic circuitry of said interior electrochromic rearview mirror assembly, and (b) shares a component of said electronic circuitry of said interior electrochromic rearview mirror assembly. 7. The voice acquisition system of claim 6 , wherein said electronic circuitry is associated with at least one mirror-based accessory selected from the group consisting of a global positioning system antenna, a motion sensor, a rain sensor, a video device, an interior light of the vehicle, an automatic toll booth transducer, a security system status indicator, a compass, a compass sensor, a temperature display, a temperature sensor, a tire pressure indicator display, a seat occupancy detection antenna, a seat occupancy detection transducer and a loudspeaker.