I wondered, for a long while, if I had tourettes until I found out that I am no means alone with my vocal sounds, mimicry and "vocal stimming".
I've met many Aspies who do much the same kind of thing that could easily be mistaken for tourettes.
With me, mainly, I wuff!
Onomatopoeia of dog sounds rather than realistic mimicry.
Most people find it cute or funny.
I often "rowf", tell myself to shush, then wuff even louder!
It's not unusual to hear me come out with something like, "Rooowwrrrr! Stop it, Gary! Wuff-WOOF!". I have no idea where this comes from.
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Ambiguous diagnosis of Apsperger's given in 2016.
Clarification and formal, written diagnosis of ASD given on 17th May 2018.