If i remember correctly, the microphone sits in the front, next to the lens.I think thats due to him having the recorder ( box ) and so the microphone inside of the helmet where there are less wind rushing buy.
In your case you would probably have to put some form of furry diffuse like used on regular microphones over part of the mobius camera
I cant remember if the microphone on the mobius are on the front or rear part of the housing.
If i remember correctly, the microphone sits in the front, next to the lens.
I'll see if I can find a decent deal on them.