First of all, I don't know why you'd use the aw vowel of Austria, on, off, or law for the a in Asperger's. I use the "short o" vowel of pot, father, and ah for this vowel since that is the closest English-language vowel to the German a. The "short a" vowel of words like as, ass, bat, and apple is sometimes also heard, but using a "short a" vowel makes it sound like "ass burgers," which sounds rather unpleasant.
My response to a previous thread on this:
NeantHumain wrote:
Hans Asperger was from Austria and spoke German, so I give it a German-like pronunciation:
/ˈɑspɚgɚ/ (ahs purr gher)
I've heard numerous other pronunciations, though:
/ˈæsbɚgɚ/ (ass bur gher)
/ˈɑspɚʤɚ/ (ahs purr jer)
/ˈæspɚʤɚ/ (ass purr jer)