interesting perhaps, but i think this is immoral. The only purpose of the uh-ah-bot is to fool you, be it conciously or unconciously.
The same goes for the silicon face humanoid robots and what not.
The bottom line of all this crap is always ''how can we trick grandma into thinking it is real so we can leave her with the robots and just forget her''.
Besides we already have the perfect robot voice.:
https://blossom.primal.net/d0a6f52381a9ee426a363f1ca672e929cf025f40dda49a8406496d16d0671ba8.mp3