Well I was playing around a bit more, and I was able to disable the(or a, not sure how many are in 2010 MBPs) internal mic by taking an old audio input jack (cu

Well I was playing around a bit more, and I was able to disable the(or a, not sure how many are in 2010 MBPs) internal mic by taking an old audio input jack (cutting the wires), plugging it in (so it looks like a nub sticking out), going to the audio settings and setting the audio port from "Sound Output" to "Sound Input" and the internal mic picked up no readings. Still trying to figure out how to do that from the command line.