Your the only other person I've heard of who's power steering "hoots" or "mooses". Definitely not the low on power steering fluid sound. Sounds almost identical to the IAC hoot here.

Let me know if that fixes it.

I live in Detroit, I couldn't give a **** how good my car is in the "twisties." "I could use a hundred people who don't know there is such a word as impossible." ~Henry Ford