Molsman,
I can tell from color of map icons that you are running the DX9 version.  I can recall very early on, vox communications caused a slight stutter on my end.  I believe DX11 may have solved that issue, but I could be wrong.  I suggest that you try again with DX11.
I would suggest that you run the DX11 version.  In order to do that, go to the AH Beta folder and find the DX11 executable (there I created a shortcut and dragged onto my desktop) and launch DX11.  The last two patches have been aimed at this (should also boost performance).
