Explanation of the Microphones on the R-7 smartglasses
There are two microphones in the glasses; One is the default that points forward, the other points downward towards the wearer of the glasses.
Please refer to Android API: http://developer.android.com/reference/android/media/MediaRecorder.AudioSource.html
Our platform only supports the above 2 variables. Default is same as MIC. Camcorder is the forward facing one.
We also support connecting to bluetooth headsets, and there are a range of those with special microphones that implement noise cancelation for outdoor issues; A BT microphone will take precedence over the local microphones in the glasses when it is paired. It should be used when any of the VOICE_* sources are specified, as per this API:
Mic Input Gain
We did do some integration with USB connected microphones a couple of years ago, but that would require you to have one of our battery packs that support connecting USB devices to the glasses. If you are interested in this, please contact us.