An amplified mic of that type will typically also amplify the background noise. It is background noise that makes voice command and communications in a vehicle challenging in the first place, that is why we always suggest some type of mic that includes noise canceling technology. In a vehicle environment, the closer the mic is to sound source of interest the better, so that background noise has even less of a chance to become a factor. This is why a headset can be the perfect solution. Since wires running to your head can be a bit cumbersome in a vehicle, we also suggest using a bluetooth headset. Nearly all bluetooth headsets include noise canceling features now.
The nice thing is that using a headset in a car is considered a normal thing now days, since many drivers already use them with their cell phones.