I have a constant inner dialogue that always seems to be talking to someone, explaining things, etc. I'll often start to whisper to myself if I'm in private.
Now my brother who I suspect also has mild AS or very high AS traits (but it doesn't interfere as much in his life) constantly verbally stims. I didn't know what to call it before or if it even is a stim, and it plain annoys me. He'll just do a series of sounds over and over. You'll be talking and it's become so common nobody notices, until I snap at him. He'll be quite for a while and then start again. I'm not sure if he's just trying to be annoying though, because he doesn't move away. But sometimes he does it alone, which would indicate he's not doing it to be annoying.