Or did she have the hick ups?
No, that was Trump having the Russians foul up the mike.
Sometimes when the pneumatics are slightly out of synch it can result in a growling-like noise. It's kind of like a heart murmur. However, I've never had experience with this particular model, and was working last night and didn't see the speech, so just speculating.
Reminds me of my 5th grade school teacher.